72102445 has 8 divisors (see below), whose sum is σ = 86588640. Its totient is φ = 57638160.

The previous prime is 72102413. The next prime is 72102449. The reversal of 72102445 is 54420127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72102445 - 2⁵ = 72102413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72102449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2946 + ... + 12364.

It is an arithmetic number, because the mean of its divisors is an integer number (10823580).

Almost surely, 2^72102445 is an apocalyptic number.

It is an amenable number.

72102445 is a deficient number, since it is larger than the sum of its proper divisors (14486195).

72102445 is a wasteful number, since it uses less digits than its factorization.

72102445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10955.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 72102445 is about 8491.3158579810. The cubic root of 72102445 is about 416.2139805365.

The spelling of 72102445 in words is "seventy-two million, one hundred two thousand, four hundred forty-five".