1012557169 has 4 divisors (see below), whose sum is σ = 1090446196. Its totient is φ = 934668144.

The previous prime is 1012557151. The next prime is 1012557181. The reversal of 1012557169 is 9617552101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9617552101 = 24371 ⋅394631.

It can be written as a sum of positive squares in 2 ways, for example, as 446688225 + 565868944 = 21135^2 + 23788^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012557169 - 2⁵ = 1012557137 is a prime.

It is a super-2 number, since 2×1012557169² = 2050544040986589122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012527169) 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, 38944494 + ... + 38944519.

It is an arithmetic number, because the mean of its divisors is an integer number (272611549).

Almost surely, 2^1012557169 is an apocalyptic number.

It is an amenable number.

1012557169 is a deficient number, since it is larger than the sum of its proper divisors (77889027).

1012557169 is an equidigital number, since it uses as much as digits as its factorization.

1012557169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77889026.

The product of its (nonzero) digits is 18900, while the sum is 37.

The square root of 1012557169 is about 31820.7034648827. The cubic root of 1012557169 is about 1004.1683239341.

The spelling of 1012557169 in words is "one billion, twelve million, five hundred fifty-seven thousand, one hundred sixty-nine".