72001025 has 6 divisors (see below), whose sum is σ = 89281302. Its totient is φ = 57600800.

The previous prime is 72001021. The next prime is 72001031. The reversal of 72001025 is 52010027.

It can be written as a sum of positive squares in 3 ways, for example, as 107584 + 71893441 = 328^2 + 8479^2 .

It is not a de Polignac number, because 72001025 - 2² = 72001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72000994 and 72001012.

It is not an unprimeable number, because it can be changed into a prime (72001021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1439996 + ... + 1440045.

It is an arithmetic number, because the mean of its divisors is an integer number (14880217).

Almost surely, 2^72001025 is an apocalyptic number.

It is an amenable number.

72001025 is a deficient number, since it is larger than the sum of its proper divisors (17280277).

72001025 is a wasteful number, since it uses less digits than its factorization.

72001025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880051 (or 2880046 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 72001025 is about 8485.3417727278. The cubic root of 72001025 is about 416.0187387546.

The spelling of 72001025 in words is "seventy-two million, one thousand, twenty-five".