45121691 has 8 divisors (see below), whose sum is σ = 45677520. Its totient is φ = 44568832.

The previous prime is 45121679. The next prime is 45121693. The reversal of 45121691 is 19612154.

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 45121691 - 2¹⁰ = 45120667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45121693) 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, 46871 + ... + 47823.

It is an arithmetic number, because the mean of its divisors is an integer number (5709690).

Almost surely, 2^45121691 is an apocalyptic number.

45121691 is a deficient number, since it is larger than the sum of its proper divisors (555829).

45121691 is a wasteful number, since it uses less digits than its factorization.

45121691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485.

The product of its digits is 2160, while the sum is 29.

The square root of 45121691 is about 6717.2681203001. The cubic root of 45121691 is about 356.0096654995.

The spelling of 45121691 in words is "forty-five million, one hundred twenty-one thousand, six hundred ninety-one".