1557955 has 12 divisors (see below), whose sum is σ = 2175120. Its totient is φ = 1068144.

The previous prime is 1557949. The next prime is 1557973. The reversal of 1557955 is 5597551.

It is not a de Polignac number, because 1557955 - 2³ = 1557947 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2935 + ... + 3424.

It is an arithmetic number, because the mean of its divisors is an integer number (181260).

2^1557955 is an apocalyptic number.

1557955 is a deficient number, since it is larger than the sum of its proper divisors (617165).

1557955 is an equidigital number, since it uses as much as digits as its factorization.

1557955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6378 (or 6371 counting only the distinct ones).

The product of its digits is 39375, while the sum is 37.

The square root of 1557955 is about 1248.1806760241. The cubic root of 1557955 is about 115.9270994586.

It can be divided in two parts, 15 and 57955, that added together give a triangular number (57970 = T₃₄₀).

The spelling of 1557955 in words is "one million, five hundred fifty-seven thousand, nine hundred fifty-five".