1557402 has 32 divisors (see below), whose sum is σ = 3884544. Its totient is φ = 404400.

The previous prime is 1557397. The next prime is 1557403. The reversal of 1557402 is 2047551.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1557403) 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, 1224 + ... + 2147.

It is an arithmetic number, because the mean of its divisors is an integer number (121392).

2^1557402 is an apocalyptic number.

1557402 is an abundant number, since it is smaller than the sum of its proper divisors (2327142).

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

1557402 is a wasteful number, since it uses less digits than its factorization.

1557402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 1557402 is about 1247.9591339463. The cubic root of 1557402 is about 115.9133816314.

It can be divided in two parts, 155 and 7402, that added together give a palindrome (7557).

The spelling of 1557402 in words is "one million, five hundred fifty-seven thousand, four hundred two".