72134651 has 4 divisors (see below), whose sum is σ = 73150704. Its totient is φ = 71118600.

The previous prime is 72134641. The next prime is 72134681. The reversal of 72134651 is 15643127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15643127 = 31 ⋅504617.

It is a cyclic number.

It is not a de Polignac number, because 72134651 - 2¹⁰ = 72133627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72134611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507920 + ... + 508061.

It is an arithmetic number, because the mean of its divisors is an integer number (18287676).

Almost surely, 2^72134651 is an apocalyptic number.

72134651 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

72134651 is a deficient number, since it is larger than the sum of its proper divisors (1016053).

72134651 is a wasteful number, since it uses less digits than its factorization.

72134651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016052.

The product of its digits is 5040, while the sum is 29.

The square root of 72134651 is about 8493.2120543408. The cubic root of 72134651 is about 416.2759414134.

Adding to 72134651 its reverse (15643127), we get a palindrome (87777778).

The spelling of 72134651 in words is "seventy-two million, one hundred thirty-four thousand, six hundred fifty-one".