71957461 has 4 divisors (see below), whose sum is σ = 72388512. Its totient is φ = 71526412.

The previous prime is 71957453. The next prime is 71957471. The reversal of 71957461 is 16475917.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16475917 = 61 ⋅270097.

It is a cyclic number.

It is not a de Polignac number, because 71957461 - 2³ = 71957453 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71957471) 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, 215275 + ... + 215608.

It is an arithmetic number, because the mean of its divisors is an integer number (18097128).

Almost surely, 2^71957461 is an apocalyptic number.

It is an amenable number.

71957461 is a deficient number, since it is larger than the sum of its proper divisors (431051).

71957461 is a wasteful number, since it uses less digits than its factorization.

71957461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431050.

The product of its digits is 52920, while the sum is 40.

The square root of 71957461 is about 8482.7743692733. The cubic root of 71957461 is about 415.9348182052.

The spelling of 71957461 in words is "seventy-one million, nine hundred fifty-seven thousand, four hundred sixty-one".