72001042 has 4 divisors (see below), whose sum is σ = 108001566. Its totient is φ = 36000520.

The previous prime is 72001031. The next prime is 72001073. The reversal of 72001042 is 24010027.

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., 70879561 + 1121481 = 8419^2 + 1059^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18000259 + ... + 18000262.

Almost surely, 2^72001042 is an apocalyptic number.

72001042 is a deficient number, since it is larger than the sum of its proper divisors (36000524).

72001042 is a wasteful number, since it uses less digits than its factorization.

72001042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36000523.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 72001042 is about 8485.3427744553. The cubic root of 72001042 is about 416.0187714964.

Adding to 72001042 its reverse (24010027), we get a palindrome (96011069).

The spelling of 72001042 in words is "seventy-two million, one thousand, forty-two".