72120135 has 8 divisors (see below), whose sum is σ = 115392240. Its totient is φ = 38464064.

The previous prime is 72120109. The next prime is 72120151. The reversal of 72120135 is 53102127.

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

It is a cyclic number.

It is not a de Polignac number, because 72120135 - 2¹⁰ = 72119111 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2403990 + ... + 2404019.

It is an arithmetic number, because the mean of its divisors is an integer number (14424030).

Almost surely, 2^72120135 is an apocalyptic number.

72120135 is a deficient number, since it is larger than the sum of its proper divisors (43272105).

72120135 is a wasteful number, since it uses less digits than its factorization.

72120135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4808017.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 72120135 is about 8492.3574465516. The cubic root of 72120135 is about 416.2480164755.

The spelling of 72120135 in words is "seventy-two million, one hundred twenty thousand, one hundred thirty-five".