71245977 has 16 divisors (see below), whose sum is σ = 103876608. Its totient is φ = 43076880.

The previous prime is 71245949. The next prime is 71246023. The reversal of 71245977 is 77954217.

It is not a de Polignac number, because 71245977 - 2¹⁴ = 71229593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71245177) 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, 12948 + ... + 17610.

It is an arithmetic number, because the mean of its divisors is an integer number (6492288).

Almost surely, 2^71245977 is an apocalyptic number.

It is an amenable number.

71245977 is a deficient number, since it is larger than the sum of its proper divisors (32630631).

71245977 is a wasteful number, since it uses less digits than its factorization.

71245977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5140.

The product of its digits is 123480, while the sum is 42.

The square root of 71245977 is about 8440.7332027496. The cubic root of 71245977 is about 414.5594143542.

The spelling of 71245977 in words is "seventy-one million, two hundred forty-five thousand, nine hundred seventy-seven".