72302621 has 8 divisors (see below), whose sum is σ = 73463040. Its totient is φ = 71150112.

The previous prime is 72302609. The next prime is 72302623. The reversal of 72302621 is 12620327.

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 72302621 - 2¹⁰ = 72301597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72302623) 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 7 ways as a sum of consecutive naturals, for example, 18026 + ... + 21668.

It is an arithmetic number, because the mean of its divisors is an integer number (9182880).

Almost surely, 2^72302621 is an apocalyptic number.

It is an amenable number.

72302621 is a deficient number, since it is larger than the sum of its proper divisors (1160419).

72302621 is a wasteful number, since it uses less digits than its factorization.

72302621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 72302621 is about 8503.0947895457. The cubic root of 72302621 is about 416.5987990439.

Adding to 72302621 its reverse (12620327), we get a palindrome (84922948).

It can be divided in two parts, 72 and 302621, that multiplied together give a palindrome (21788712).

The spelling of 72302621 in words is "seventy-two million, three hundred two thousand, six hundred twenty-one".