72301541 has 4 divisors (see below), whose sum is σ = 77863212. Its totient is φ = 66739872.

The previous prime is 72301529. The next prime is 72301547. The reversal of 72301541 is 14510327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3062500 + 69239041 = 1750^2 + 8321^2 .

It is a cyclic number.

It is not a de Polignac number, because 72301541 - 2⁶ = 72301477 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 (72301547) 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, 2780816 + ... + 2780841.

It is an arithmetic number, because the mean of its divisors is an integer number (19465803).

Almost surely, 2^72301541 is an apocalyptic number.

It is an amenable number.

72301541 is a deficient number, since it is larger than the sum of its proper divisors (5561671).

72301541 is a wasteful number, since it uses less digits than its factorization.

72301541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5561670.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 72301541 is about 8503.0312830190. The cubic root of 72301541 is about 416.5967247579.

Adding to 72301541 its reverse (14510327), we get a palindrome (86811868).

The spelling of 72301541 in words is "seventy-two million, three hundred one thousand, five hundred forty-one".