60451721 has 6 divisors (see below), whose sum is σ = 66447066. Its totient is φ = 54956000.

The previous prime is 60451709. The next prime is 60451733. The reversal of 60451721 is 12715406.

It is an interprime number because it is at equal distance from previous prime (60451709) and next prime (60451733).

It can be written as a sum of positive squares in only one way, i.e., 50965321 + 9486400 = 7139^2 + 3080^2 .

It is not a de Polignac number, because 60451721 - 2²² = 56257417 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 (60451771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 249680 + ... + 249921.

It is an arithmetic number, because the mean of its divisors is an integer number (11074511).

Almost surely, 2^60451721 is an apocalyptic number.

It is an amenable number.

60451721 is a deficient number, since it is larger than the sum of its proper divisors (5995345).

60451721 is a wasteful number, since it uses less digits than its factorization.

60451721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499623 (or 499612 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 60451721 is about 7775.0704819956. The cubic root of 60451721 is about 392.4667687932.

It can be divided in two parts, 604 and 51721, that added together give a palindrome (52325).

The spelling of 60451721 in words is "sixty million, four hundred fifty-one thousand, seven hundred twenty-one".