45162121 has 4 divisors (see below), whose sum is σ = 45175572. Its totient is φ = 45148672.

The previous prime is 45162109. The next prime is 45162127. The reversal of 45162121 is 12126154.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8620096 + 36542025 = 2936^2 + 6045^2 .

It is a cyclic number.

It is not a de Polignac number, because 45162121 - 2²¹ = 43064969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45162092 and 45162101.

It is not an unprimeable number, because it can be changed into a prime (45162127) 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, 2985 + ... + 9961.

It is an arithmetic number, because the mean of its divisors is an integer number (11293893).

Almost surely, 2^45162121 is an apocalyptic number.

It is an amenable number.

45162121 is a deficient number, since it is larger than the sum of its proper divisors (13451).

45162121 is an equidigital number, since it uses as much as digits as its factorization.

45162121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13450.

The product of its digits is 480, while the sum is 22.

The square root of 45162121 is about 6720.2768544160. The cubic root of 45162121 is about 356.1159645147.

Adding to 45162121 its reverse (12126154), we get a palindrome (57288275).

The spelling of 45162121 in words is "forty-five million, one hundred sixty-two thousand, one hundred twenty-one".