45138961 has 8 divisors (see below), whose sum is σ = 54622080. Its totient is φ = 36414528.

The previous prime is 45138959. The next prime is 45138979. The reversal of 45138961 is 16983154.

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 45138961 - 2¹ = 45138959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45138961.

It is not an unprimeable number, because it can be changed into a prime (45138901) 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, 189541 + ... + 189778.

It is an arithmetic number, because the mean of its divisors is an integer number (6827760).

Almost surely, 2^45138961 is an apocalyptic number.

It is an amenable number.

45138961 is a deficient number, since it is larger than the sum of its proper divisors (9483119).

45138961 is a wasteful number, since it uses less digits than its factorization.

45138961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379343.

The product of its digits is 25920, while the sum is 37.

The square root of 45138961 is about 6718.5534901495. The cubic root of 45138961 is about 356.0550797452.

The spelling of 45138961 in words is "forty-five million, one hundred thirty-eight thousand, nine hundred sixty-one".