1055671157 has 4 divisors (see below), whose sum is σ = 1081419276. Its totient is φ = 1029923040.

The previous prime is 1055671147. The next prime is 1055671159. The reversal of 1055671157 is 7511765501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 633327556 + 422343601 = 25166^2 + 20551^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055671157 - 2⁶ = 1055671093 is a prime.

It is a super-2 number, since 2×1055671157² = 2228883183443437298, 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 1055671157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055671159) 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, 12873998 + ... + 12874079.

It is an arithmetic number, because the mean of its divisors is an integer number (270354819).

Almost surely, 2^1055671157 is an apocalyptic number.

It is an amenable number.

1055671157 is a deficient number, since it is larger than the sum of its proper divisors (25748119).

1055671157 is an equidigital number, since it uses as much as digits as its factorization.

1055671157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25748118.

The product of its (nonzero) digits is 36750, while the sum is 38.

The square root of 1055671157 is about 32491.0935026816. The cubic root of 1055671157 is about 1018.2229589628. Note that the first 3 decimals are identical.

The spelling of 1055671157 in words is "one billion, fifty-five million, six hundred seventy-one thousand, one hundred fifty-seven".