45277721 has 8 divisors (see below), whose sum is σ = 46384800. Its totient is φ = 44182080.

The previous prime is 45277717. The next prime is 45277723. The reversal of 45277721 is 12777254.

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 45277721 - 2² = 45277717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45277723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5441 + ... + 10961.

It is an arithmetic number, because the mean of its divisors is an integer number (5798100).

Almost surely, 2^45277721 is an apocalyptic number.

It is an amenable number.

45277721 is a deficient number, since it is larger than the sum of its proper divisors (1107079).

45277721 is a wasteful number, since it uses less digits than its factorization.

45277721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5719.

The product of its digits is 27440, while the sum is 35.

The square root of 45277721 is about 6728.8721937632. The cubic root of 45277721 is about 356.4195517529.

It can be divided in two parts, 4 and 5277721, that added together give a palindrome (5277725).

The spelling of 45277721 in words is "forty-five million, two hundred seventy-seven thousand, seven hundred twenty-one".