71452639 has 8 divisors (see below), whose sum is σ = 73038672. Its totient is φ = 69875520.

The previous prime is 71452637. The next prime is 71452657. The reversal of 71452639 is 93625417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71452639 - 2¹ = 71452637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71452598 and 71452607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71452637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15507 + ... + 19579.

It is an arithmetic number, because the mean of its divisors is an integer number (9129834).

Almost surely, 2^71452639 is an apocalyptic number.

71452639 is a deficient number, since it is larger than the sum of its proper divisors (1586033).

71452639 is a wasteful number, since it uses less digits than its factorization.

71452639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4457.

The product of its digits is 45360, while the sum is 37.

The square root of 71452639 is about 8452.9662840922. The cubic root of 71452639 is about 414.9598625719.

The spelling of 71452639 in words is "seventy-one million, four hundred fifty-two thousand, six hundred thirty-nine".