71140961 has 4 divisors (see below), whose sum is σ = 72346800. Its totient is φ = 69935124.

The previous prime is 71140957. The next prime is 71140969. The reversal of 71140961 is 16904117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71140961 - 2² = 71140957 is a prime.

It is a super-2 number, since 2×71140961² = 10122072664007042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71140969) 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, 602831 + ... + 602948.

It is an arithmetic number, because the mean of its divisors is an integer number (18086700).

Almost surely, 2^71140961 is an apocalyptic number.

It is an amenable number.

71140961 is a deficient number, since it is larger than the sum of its proper divisors (1205839).

71140961 is a wasteful number, since it uses less digits than its factorization.

71140961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205838.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 71140961 is about 8434.5101221114. The cubic root of 71140961 is about 414.3556284420.

The spelling of 71140961 in words is "seventy-one million, one hundred forty thousand, nine hundred sixty-one".