71520460 has 24 divisors (see below), whose sum is σ = 163847376. Its totient is φ = 26007360.

The previous prime is 71520451. The next prime is 71520469. The reversal of 71520460 is 6402517.

It is an interprime number because it is at equal distance from previous prime (71520451) and next prime (71520469).

It is a super-2 number, since 2×71520460² = 10230352397223200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71520469) 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, 162327 + ... + 162766.

It is an arithmetic number, because the mean of its divisors is an integer number (6826974).

Almost surely, 2^71520460 is an apocalyptic number.

It is an amenable number.

71520460 is an abundant number, since it is smaller than the sum of its proper divisors (92326916).

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

71520460 is a wasteful number, since it uses less digits than its factorization.

71520460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325113 (or 325111 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 71520460 is about 8456.9770012694. The cubic root of 71520460 is about 415.0911107839.

Adding to 71520460 its reverse (6402517), we get a palindrome (77922977).

The spelling of 71520460 in words is "seventy-one million, five hundred twenty thousand, four hundred sixty".