72001407 has 4 divisors (see below), whose sum is σ = 96001880. Its totient is φ = 48000936.

The previous prime is 72001381. The next prime is 72001439. The reversal of 72001407 is 70410027.

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

It is not a de Polignac number, because 72001407 - 2⁶ = 72001343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72001807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12000232 + ... + 12000237.

It is an arithmetic number, because the mean of its divisors is an integer number (24000470).

Almost surely, 2^72001407 is an apocalyptic number.

72001407 is a deficient number, since it is larger than the sum of its proper divisors (24000473).

72001407 is a wasteful number, since it uses less digits than its factorization.

72001407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24000472.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 72001407 is about 8485.3642821036. The cubic root of 72001407 is about 416.0194744797.

The spelling of 72001407 in words is "seventy-two million, one thousand, four hundred seven".