72951251 has 2 divisors, whose sum is σ = 72951252. Its totient is φ = 72951250.

The previous prime is 72951247. The next prime is 72951257. The reversal of 72951251 is 15215927.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72951251 - 2² = 72951247 is a prime.

It is equal to p_4281377 and since 72951251 and 4281377 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72951257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36475625 + 36475626.

It is an arithmetic number, because the mean of its divisors is an integer number (36475626).

Almost surely, 2^72951251 is an apocalyptic number.

72951251 is a deficient number, since it is larger than the sum of its proper divisors (1).

72951251 is an equidigital number, since it uses as much as digits as its factorization.

72951251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 32.

The square root of 72951251 is about 8541.1504494418. The cubic root of 72951251 is about 417.8408675947.

The spelling of 72951251 in words is "seventy-two million, nine hundred fifty-one thousand, two hundred fifty-one".