1171513961 has 16 divisors (see below), whose sum is σ = 1219074624. Its totient is φ = 1125119424.

The previous prime is 1171513939. The next prime is 1171513991. The reversal of 1171513961 is 1693151711.

It is a cyclic number.

It is not a de Polignac number, because 1171513961 - 2¹⁴ = 1171497577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1171513921) 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, 613370 + ... + 615276.

It is an arithmetic number, because the mean of its divisors is an integer number (76192164).

Almost surely, 2^1171513961 is an apocalyptic number.

It is an amenable number.

1171513961 is a deficient number, since it is larger than the sum of its proper divisors (47560663).

1171513961 is a wasteful number, since it uses less digits than its factorization.

1171513961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200.

The product of its digits is 5670, while the sum is 35.

The square root of 1171513961 is about 34227.3861257327. The cubic root of 1171513961 is about 1054.1825495424.

The spelling of 1171513961 in words is "one billion, one hundred seventy-one million, five hundred thirteen thousand, nine hundred sixty-one".