1162878201 has 27 divisors (see below), whose sum is σ = 1748381583. Its totient is φ = 773410680.

The previous prime is 1162878173. The next prime is 1162878209. The reversal of 1162878201 is 1028782611.

The square root of 1162878201 is 34101.

It is a perfect power (a square), and thus also a powerful number.

1162878201 is a `hidden beast` number, since 1 + 1 + 628 + 7 + 8 + 20 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5517801 + 1157360400 = 2349^2 + 34020^2 .

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 1162878201 - 2²³ = 1154489593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1162878209) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2761971 + ... + 2762391.

Almost surely, 2^1162878201 is an apocalyptic number.

1162878201 is the 34101-st square number.

1162878201 is the 17051-st centered octagonal number.

It is an amenable number.

1162878201 is a deficient number, since it is larger than the sum of its proper divisors (585503382).

1162878201 is an frugal number, since it uses more digits than its factorization.

1162878201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The cubic root of 1162878201 is about 1051.5858729504.

Multiplying 1162878201 by its sum of digits (36), we get a square (41863615236 = 204606²).

The spelling of 1162878201 in words is "one billion, one hundred sixty-two million, eight hundred seventy-eight thousand, two hundred one".