71625541 has 4 divisors (see below), whose sum is σ = 77135212. Its totient is φ = 66115872.

The previous prime is 71625503. The next prime is 71625551. The reversal of 71625541 is 14552617.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24304900 + 47320641 = 4930^2 + 6879^2 .

It is a cyclic number.

It is not a de Polignac number, because 71625541 - 2⁷ = 71625413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71625551) 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, 2754816 + ... + 2754841.

It is an arithmetic number, because the mean of its divisors is an integer number (19283803).

Almost surely, 2^71625541 is an apocalyptic number.

It is an amenable number.

71625541 is a deficient number, since it is larger than the sum of its proper divisors (5509671).

71625541 is a wasteful number, since it uses less digits than its factorization.

71625541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509670.

The product of its digits is 8400, while the sum is 31.

The square root of 71625541 is about 8463.1874019190. The cubic root of 71625541 is about 415.2943013325.

The spelling of 71625541 in words is "seventy-one million, six hundred twenty-five thousand, five hundred forty-one".