71252540 has 12 divisors (see below), whose sum is σ = 149630376. Its totient is φ = 28501008.

The previous prime is 71252513. The next prime is 71252567. The reversal of 71252540 is 4525217.

It is an interprime number because it is at equal distance from previous prime (71252513) and next prime (71252567).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781294 + ... + 1781333.

It is an arithmetic number, because the mean of its divisors is an integer number (12469198).

Almost surely, 2^71252540 is an apocalyptic number.

It is an amenable number.

71252540 is an abundant number, since it is smaller than the sum of its proper divisors (78377836).

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

71252540 is a wasteful number, since it uses less digits than its factorization.

71252540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562636 (or 3562634 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 71252540 is about 8441.1219633411. The cubic root of 71252540 is about 414.5721433532.

Adding to 71252540 its reverse (4525217), we get a palindrome (75777757).

The spelling of 71252540 in words is "seventy-one million, two hundred fifty-two thousand, five hundred forty".