45721271 has 4 divisors (see below), whose sum is σ = 46694112. Its totient is φ = 44748432.

The previous prime is 45721267. The next prime is 45721289. The reversal of 45721271 is 17212754.

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

It is a cyclic number.

It is not a de Polignac number, because 45721271 - 2² = 45721267 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 (45721261) 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, 486350 + ... + 486443.

It is an arithmetic number, because the mean of its divisors is an integer number (11673528).

Almost surely, 2^45721271 is an apocalyptic number.

45721271 is a deficient number, since it is larger than the sum of its proper divisors (972841).

45721271 is an equidigital number, since it uses as much as digits as its factorization.

45721271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972840.

The product of its digits is 3920, while the sum is 29.

The square root of 45721271 is about 6761.7505869412. The cubic root of 45721271 is about 357.5796252782.

It can be divided in two parts, 4 and 5721271, that added together give a palindrome (5721275).

The spelling of 45721271 in words is "forty-five million, seven hundred twenty-one thousand, two hundred seventy-one".