1957557 has 24 divisors (see below), whose sum is σ = 3114048. Its totient is φ = 1071360.

The previous prime is 1957547. The next prime is 1957573. The reversal of 1957557 is 7557591.

It is not a de Polignac number, because 1957557 - 2⁸ = 1957301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20133 + ... + 20229.

It is an arithmetic number, because the mean of its divisors is an integer number (129752).

2^1957557 is an apocalyptic number.

It is an amenable number.

1957557 is a deficient number, since it is larger than the sum of its proper divisors (1156491).

1957557 is an equidigital number, since it uses as much as digits as its factorization.

1957557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 138 counting only the distinct ones).

The product of its digits is 55125, while the sum is 39.

The square root of 1957557 is about 1399.1272279532. The cubic root of 1957557 is about 125.0944779067.

The spelling of 1957557 in words is "one million, nine hundred fifty-seven thousand, five hundred fifty-seven".