72451361 has 2 divisors, whose sum is σ = 72451362. Its totient is φ = 72451360.

The previous prime is 72451349. The next prime is 72451373. The reversal of 72451361 is 16315427.

It is a balanced prime because it is at equal distance from previous prime (72451349) and next prime (72451373).

It can be written as a sum of positive squares in only one way, i.e., 61528336 + 10923025 = 7844^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 72451361 - 2¹⁰ = 72450337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72451391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36225680 + 36225681.

It is an arithmetic number, because the mean of its divisors is an integer number (36225681).

Almost surely, 2^72451361 is an apocalyptic number.

It is an amenable number.

72451361 is a deficient number, since it is larger than the sum of its proper divisors (1).

72451361 is an equidigital number, since it uses as much as digits as its factorization.

72451361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 29.

The square root of 72451361 is about 8511.8365233362. The cubic root of 72451361 is about 416.8842772275.

Adding to 72451361 its reverse (16315427), we get a palindrome (88766788).

The spelling of 72451361 in words is "seventy-two million, four hundred fifty-one thousand, three hundred sixty-one".