1553420 has 48 divisors (see below), whose sum is σ = 3725568. Its totient is φ = 538560.

The previous prime is 1553417. The next prime is 1553423. The reversal of 1553420 is 243551.

It is an interprime number because it is at equal distance from previous prime (1553417) and next prime (1553423).

It is a super-2 number, since 2×1553420² = 4826227392800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1553392 and 1553401.

It is not an unprimeable number, because it can be changed into a prime (1553423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4907 + ... + 5213.

It is an arithmetic number, because the mean of its divisors is an integer number (77616).

2^1553420 is an apocalyptic number.

1553420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1553420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862784).

1553420 is an abundant number, since it is smaller than the sum of its proper divisors (2172148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1553420 is a wasteful number, since it uses less digits than its factorization.

1553420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1553420 is about 1246.3627080429. The cubic root of 1553420 is about 115.8145073465.

Adding to 1553420 its reverse (243551), we get a palindrome (1796971).

It can be divided in two parts, 15 and 53420, that added together give a palindrome (53435).

The spelling of 1553420 in words is "one million, five hundred fifty-three thousand, four hundred twenty".