72442761 has 4 divisors (see below), whose sum is σ = 96590352. Its totient is φ = 48295172.

The previous prime is 72442759. The next prime is 72442771. The reversal of 72442761 is 16724427.

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.

It is a cyclic number.

It is not a de Polignac number, because 72442761 - 2¹ = 72442759 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72442751) 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 3 ways as a sum of consecutive naturals, for example, 12073791 + ... + 12073796.

It is an arithmetic number, because the mean of its divisors is an integer number (24147588).

Almost surely, 2^72442761 is an apocalyptic number.

It is an amenable number.

72442761 is a deficient number, since it is larger than the sum of its proper divisors (24147591).

72442761 is a wasteful number, since it uses less digits than its factorization.

72442761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24147590.

The product of its digits is 18816, while the sum is 33.

The square root of 72442761 is about 8511.3313294690. The cubic root of 72442761 is about 416.8677818086.

The spelling of 72442761 in words is "seventy-two million, four hundred forty-two thousand, seven hundred sixty-one".