1057157887 has 4 divisors (see below), whose sum is σ = 1079650656. Its totient is φ = 1034665120.

The previous prime is 1057157863. The next prime is 1057157921. The reversal of 1057157887 is 7887517501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7887517501 = 1061 ⋅7434041.

It is a cyclic number.

It is not a de Polignac number, because 1057157887 - 2¹⁵ = 1057125119 is a prime.

It is a super-2 number, since 2×1057157887² = 2235165596092609538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1057157887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057157287) 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, 11246314 + ... + 11246407.

It is an arithmetic number, because the mean of its divisors is an integer number (269912664).

Almost surely, 2^1057157887 is an apocalyptic number.

1057157887 is a deficient number, since it is larger than the sum of its proper divisors (22492769).

1057157887 is an equidigital number, since it uses as much as digits as its factorization.

1057157887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22492768.

The product of its (nonzero) digits is 548800, while the sum is 49.

The square root of 1057157887 is about 32513.9644921993. The cubic root of 1057157887 is about 1018.7007316457.

The spelling of 1057157887 in words is "one billion, fifty-seven million, one hundred fifty-seven thousand, eight hundred eighty-seven".