45197121 has 16 divisors (see below), whose sum is σ = 61461504. Its totient is φ = 29538384.

The previous prime is 45197083. The next prime is 45197123. The reversal of 45197121 is 12179154.

It is not a de Polignac number, because 45197121 - 2⁹ = 45196609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45197123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32380 + ... + 33746.

It is an arithmetic number, because the mean of its divisors is an integer number (3841344).

Almost surely, 2^45197121 is an apocalyptic number.

It is an amenable number.

45197121 is a deficient number, since it is larger than the sum of its proper divisors (16264383).

45197121 is a wasteful number, since it uses less digits than its factorization.

45197121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580.

The product of its digits is 2520, while the sum is 30.

The square root of 45197121 is about 6722.8804094674. The cubic root of 45197121 is about 356.2079356921.

The spelling of 45197121 in words is "forty-five million, one hundred ninety-seven thousand, one hundred twenty-one".