72245137 has 2 divisors, whose sum is σ = 72245138. Its totient is φ = 72245136.

The previous prime is 72245101. The next prime is 72245143. The reversal of 72245137 is 73154227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49434961 + 22810176 = 7031^2 + 4776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72245137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72245099 and 72245108.

It is not a weakly prime, because it can be changed into another prime (72243137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36122568 + 36122569.

It is an arithmetic number, because the mean of its divisors is an integer number (36122569).

Almost surely, 2^72245137 is an apocalyptic number.

It is an amenable number.

72245137 is a deficient number, since it is larger than the sum of its proper divisors (1).

72245137 is an equidigital number, since it uses as much as digits as its factorization.

72245137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 31.

The square root of 72245137 is about 8499.7139363628. The cubic root of 72245137 is about 416.4883645287.

The spelling of 72245137 in words is "seventy-two million, two hundred forty-five thousand, one hundred thirty-seven".