72975045 has 48 divisors (see below), whose sum is σ = 137979072. Its totient is φ = 32647680.

The previous prime is 72975043. The next prime is 72975047. The reversal of 72975045 is 54057927.

It is an interprime number because it is at equal distance from previous prime (72975043) and next prime (72975047).

It is not a de Polignac number, because 72975045 - 2¹ = 72975043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 72974994 and 72975012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72975043) 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 47 ways as a sum of consecutive naturals, for example, 26577 + ... + 29193.

It is an arithmetic number, because the mean of its divisors is an integer number (2874564).

Almost surely, 2^72975045 is an apocalyptic number.

It is an amenable number.

72975045 is a deficient number, since it is larger than the sum of its proper divisors (65004027).

72975045 is a wasteful number, since it uses less digits than its factorization.

72975045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 72975045 is about 8542.5432395745. The cubic root of 72975045 is about 417.8862907357.

The spelling of 72975045 in words is "seventy-two million, nine hundred seventy-five thousand, forty-five".