45194621 has 4 divisors (see below), whose sum is σ = 46652544. Its totient is φ = 43736700.

The previous prime is 45194549. The next prime is 45194623. The reversal of 45194621 is 12649154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45194621 - 2¹⁸ = 44932477 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 (45194623) 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, 728915 + ... + 728976.

It is an arithmetic number, because the mean of its divisors is an integer number (11663136).

Almost surely, 2^45194621 is an apocalyptic number.

It is an amenable number.

45194621 is a deficient number, since it is larger than the sum of its proper divisors (1457923).

45194621 is a wasteful number, since it uses less digits than its factorization.

45194621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457922.

The product of its digits is 8640, while the sum is 32.

The square root of 45194621 is about 6722.6944746880. The cubic root of 45194621 is about 356.2013678972.

The spelling of 45194621 in words is "forty-five million, one hundred ninety-four thousand, six hundred twenty-one".