72015453 has 16 divisors (see below), whose sum is σ = 112305600. Its totient is φ = 45483120.

The previous prime is 72015443. The next prime is 72015457. The reversal of 72015453 is 35451027.

It is a happy number.

72015453 is a `hidden beast` number, since 7 + 201 + 5 + 453 = 666.

It is not a de Polignac number, because 72015453 - 2¹⁸ = 71753309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72015457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69678 + ... + 70703.

It is an arithmetic number, because the mean of its divisors is an integer number (7019100).

Almost surely, 2^72015453 is an apocalyptic number.

It is an amenable number.

72015453 is a deficient number, since it is larger than the sum of its proper divisors (40290147).

72015453 is a wasteful number, since it uses less digits than its factorization.

72015453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140409 (or 140403 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 72015453 is about 8486.1919021432. The cubic root of 72015453 is about 416.0465250141.

The spelling of 72015453 in words is "seventy-two million, fifteen thousand, four hundred fifty-three".