72054457 has 2 divisors, whose sum is σ = 72054458. Its totient is φ = 72054456.

The previous prime is 72054443. The next prime is 72054497. The reversal of 72054457 is 75445027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 5125696 = 8181^2 + 2264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72054457 is a prime.

It is not a weakly prime, because it can be changed into another prime (72054407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36027228 + 36027229.

It is an arithmetic number, because the mean of its divisors is an integer number (36027229).

Almost surely, 2^72054457 is an apocalyptic number.

It is an amenable number.

72054457 is a deficient number, since it is larger than the sum of its proper divisors (1).

72054457 is an equidigital number, since it uses as much as digits as its factorization.

72054457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 72054457 is about 8488.4896772041. The cubic root of 72054457 is about 416.1216225533.

The spelling of 72054457 in words is "seventy-two million, fifty-four thousand, four hundred fifty-seven".