72499451 has 2 divisors, whose sum is σ = 72499452. Its totient is φ = 72499450.

The previous prime is 72499447. The next prime is 72499457. The reversal of 72499451 is 15499427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72499451 - 2² = 72499447 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72499399 and 72499408.

It is not a weakly prime, because it can be changed into another prime (72499457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36249725 + 36249726.

It is an arithmetic number, because the mean of its divisors is an integer number (36249726).

Almost surely, 2^72499451 is an apocalyptic number.

72499451 is a deficient number, since it is larger than the sum of its proper divisors (1).

72499451 is an equidigital number, since it uses as much as digits as its factorization.

72499451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 72499451 is about 8514.6609445121. The cubic root of 72499451 is about 416.9764932586.

The spelling of 72499451 in words is "seventy-two million, four hundred ninety-nine thousand, four hundred fifty-one".