72145354 has 4 divisors (see below), whose sum is σ = 108218034. Its totient is φ = 36072676.

The previous prime is 72145351. The next prime is 72145361. The reversal of 72145354 is 45354127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 69272329 + 2873025 = 8323^2 + 1695^2 .

It is not an unprimeable number, because it can be changed into a prime (72145351) 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, 18036337 + ... + 18036340.

Almost surely, 2^72145354 is an apocalyptic number.

72145354 is a deficient number, since it is larger than the sum of its proper divisors (36072680).

72145354 is a wasteful number, since it uses less digits than its factorization.

72145354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36072679.

The product of its digits is 16800, while the sum is 31.

The square root of 72145354 is about 8493.8421223849. The cubic root of 72145354 is about 416.2965287502.

The spelling of 72145354 in words is "seventy-two million, one hundred forty-five thousand, three hundred fifty-four".