45721394 has 8 divisors (see below), whose sum is σ = 68648448. Its totient is φ = 22838580.

The previous prime is 45721393. The next prime is 45721439. The reversal of 45721394 is 49312754.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45721393) 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, 8342 + ... + 12689.

It is an arithmetic number, because the mean of its divisors is an integer number (8581056).

Almost surely, 2^45721394 is an apocalyptic number.

45721394 is a deficient number, since it is larger than the sum of its proper divisors (22927054).

45721394 is a wasteful number, since it uses less digits than its factorization.

45721394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22120.

The product of its digits is 30240, while the sum is 35.

The square root of 45721394 is about 6761.7596822129. The cubic root of 45721394 is about 357.5799459332.

The spelling of 45721394 in words is "forty-five million, seven hundred twenty-one thousand, three hundred ninety-four".