1523420 has 36 divisors (see below), whose sum is σ = 3392424. Its totient is φ = 574560.

The previous prime is 1523419. The next prime is 1523429. The reversal of 1523420 is 243251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7115 + ... + 7325.

It is an arithmetic number, because the mean of its divisors is an integer number (94234).

2^1523420 is an apocalyptic number.

1523420 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 1523420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1696212).

1523420 is an abundant number, since it is smaller than the sum of its proper divisors (1869004).

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

1523420 is a wasteful number, since it uses less digits than its factorization.

1523420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1523420 is about 1234.2690144373. The cubic root of 1523420 is about 115.0641104407.

Adding to 1523420 its reverse (243251), we get a palindrome (1766671).

The spelling of 1523420 in words is "one million, five hundred twenty-three thousand, four hundred twenty".