1151957261 has 16 divisors (see below), whose sum is σ = 1423094400. Its totient is φ = 908031168.

The previous prime is 1151957207. The next prime is 1151957267. The reversal of 1151957261 is 1627591511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151957261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151957267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950 + ... + 48008.

It is an arithmetic number, because the mean of its divisors is an integer number (88943400).

Almost surely, 2^1151957261 is an apocalyptic number.

It is an amenable number.

1151957261 is a deficient number, since it is larger than the sum of its proper divisors (271137139).

1151957261 is a wasteful number, since it uses less digits than its factorization.

1151957261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47348.

The product of its digits is 18900, while the sum is 38.

The square root of 1151957261 is about 33940.4958861829. The cubic root of 1151957261 is about 1048.2835936498.

The spelling of 1151957261 in words is "one billion, one hundred fifty-one million, nine hundred fifty-seven thousand, two hundred sixty-one".