1557156 has 12 divisors (see below), whose sum is σ = 3633392. Its totient is φ = 519048.

The previous prime is 1557151. The next prime is 1557211. The reversal of 1557156 is 6517551.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1557151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64870 + ... + 64893.

2^1557156 is an apocalyptic number.

It is an amenable number.

1557156 is an abundant number, since it is smaller than the sum of its proper divisors (2076236).

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

1557156 is a wasteful number, since it uses less digits than its factorization.

1557156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129770 (or 129768 counting only the distinct ones).

The product of its digits is 5250, while the sum is 30.

The square root of 1557156 is about 1247.8605691342. The cubic root of 1557156 is about 115.9072782632.

The spelling of 1557156 in words is "one million, five hundred fifty-seven thousand, one hundred fifty-six".