72601481 has 2 divisors, whose sum is σ = 72601482. Its totient is φ = 72601480.

The previous prime is 72601469. The next prime is 72601523. The reversal of 72601481 is 18410627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49224256 + 23377225 = 7016^2 + 4835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72601481 is a prime.

It is a super-2 number, since 2×72601481² = 10541950086786722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (72601421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36300740 + 36300741.

It is an arithmetic number, because the mean of its divisors is an integer number (36300741).

Almost surely, 2^72601481 is an apocalyptic number.

It is an amenable number.

72601481 is a deficient number, since it is larger than the sum of its proper divisors (1).

72601481 is an equidigital number, since it uses as much as digits as its factorization.

72601481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 72601481 is about 8520.6502686121. The cubic root of 72601481 is about 417.1720081619.

The spelling of 72601481 in words is "seventy-two million, six hundred one thousand, four hundred eighty-one".