71042472 has 48 divisors (see below), whose sum is σ = 196047540. Its totient is φ = 23232768.

The previous prime is 71042471. The next prime is 71042519. The reversal of 71042472 is 27424017.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 58890276 + 12152196 = 7674^2 + 3486^2 .

It is not an unprimeable number, because it can be changed into a prime (71042471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5493 + ... + 13124.

Almost surely, 2^71042472 is an apocalyptic number.

71042472 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

71042472 is an abundant number, since it is smaller than the sum of its proper divisors (125005068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71042472 is a wasteful number, since it uses less digits than its factorization.

71042472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18682 (or 18675 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 71042472 is about 8428.6696459168. The cubic root of 71042472 is about 414.1643260010.

Adding to 71042472 its reverse (27424017), we get a palindrome (98466489).

The spelling of 71042472 in words is "seventy-one million, forty-two thousand, four hundred seventy-two".