1211157162 has 24 divisors (see below), whose sum is σ = 2660124324. Its totient is φ = 398188224.

The previous prime is 1211157119. The next prime is 1211157173. The reversal of 1211157162 is 2617511121.

1211157162 is a `hidden beast` number, since 1 + 21 + 11 + 571 + 62 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1060088481 + 151068681 = 32559^2 + 12291^2 .

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, 459553 + ... + 462180.

Almost surely, 2^1211157162 is an apocalyptic number.

1211157162 is an abundant number, since it is smaller than the sum of its proper divisors (1448967162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211157162 is a wasteful number, since it uses less digits than its factorization.

1211157162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921814 (or 921811 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 1211157162 is about 34801.6833213567. The cubic root of 1211157162 is about 1065.9418184603.

Adding to 1211157162 its reverse (2617511121), we get a palindrome (3828668283).

The spelling of 1211157162 in words is "one billion, two hundred eleven million, one hundred fifty-seven thousand, one hundred sixty-two".