1553500 has 48 divisors (see below), whose sum is σ = 3669120. Its totient is φ = 571200.

The previous prime is 1553479. The next prime is 1553507. The reversal of 1553500 is 53551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553507) 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, 6381 + ... + 6619.

It is an arithmetic number, because the mean of its divisors is an integer number (76440).

2^1553500 is an apocalyptic number.

1553500 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 1553500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1834560).

1553500 is an abundant number, since it is smaller than the sum of its proper divisors (2115620).

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

1553500 is a wasteful number, since it uses less digits than its factorization.

1553500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 19.

The square root of 1553500 is about 1246.3948010161. The cubic root of 1553500 is about 115.8164954333.

It can be divided in two parts, 155 and 3500, that added together give a triangular number (3655 = T₈₅).

The spelling of 1553500 in words is "one million, five hundred fifty-three thousand, five hundred".