72134251 has 8 divisors (see below), whose sum is σ = 82623200. Its totient is φ = 61691328.

The previous prime is 72134243. The next prime is 72134261. The reversal of 72134251 is 15243127.

It is a happy number.

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 72134251 - 2³ = 72134243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72134261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8076 + ... + 14473.

It is an arithmetic number, because the mean of its divisors is an integer number (10327900).

Almost surely, 2^72134251 is an apocalyptic number.

72134251 is a deficient number, since it is larger than the sum of its proper divisors (10488949).

72134251 is a wasteful number, since it uses less digits than its factorization.

72134251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23013.

The product of its digits is 1680, while the sum is 25.

The square root of 72134251 is about 8493.1885060912. The cubic root of 72134251 is about 416.2751719695.

Adding to 72134251 its reverse (15243127), we get a palindrome (87377378).

The spelling of 72134251 in words is "seventy-two million, one hundred thirty-four thousand, two hundred fifty-one".