72706461 has 4 divisors (see below), whose sum is σ = 96941952. Its totient is φ = 48470972.

The previous prime is 72706453. The next prime is 72706477. The reversal of 72706461 is 16460727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16460727 = 3 ⋅5486909.

It is a cyclic number.

It is not a de Polignac number, because 72706461 - 2³ = 72706453 is a prime.

It is a super-2 number, since 2×72706461² = 10572458942289042, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72706261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12117741 + ... + 12117746.

It is an arithmetic number, because the mean of its divisors is an integer number (24235488).

Almost surely, 2^72706461 is an apocalyptic number.

It is an amenable number.

72706461 is a deficient number, since it is larger than the sum of its proper divisors (24235491).

72706461 is a wasteful number, since it uses less digits than its factorization.

72706461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24235490.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 72706461 is about 8526.8083712489. The cubic root of 72706461 is about 417.3729848962.

It can be divided in two parts, 7270 and 6461, that added together give a palindrome (13731).

The spelling of 72706461 in words is "seventy-two million, seven hundred six thousand, four hundred sixty-one".