72145134 has 16 divisors (see below), whose sum is σ = 160322640. Its totient is φ = 24048360.

The previous prime is 72145121. The next prime is 72145163. The reversal of 72145134 is 43154127.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 72145098 and 72145107.

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, 667957 + ... + 668064.

It is an arithmetic number, because the mean of its divisors is an integer number (10020165).

Almost surely, 2^72145134 is an apocalyptic number.

72145134 is an abundant number, since it is smaller than the sum of its proper divisors (88177506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72145134 is a wasteful number, since it uses less digits than its factorization.

72145134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336032 (or 1336026 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 72145134 is about 8493.8291718164. The cubic root of 72145134 is about 416.2961055983.

The spelling of 72145134 in words is "seventy-two million, one hundred forty-five thousand, one hundred thirty-four".