45012121 has 24 divisors (see below), whose sum is σ = 59541440. Its totient is φ = 33216480.

The previous prime is 45012119. The next prime is 45012131. The reversal of 45012121 is 12121054.

It is not a de Polignac number, because 45012121 - 2¹ = 45012119 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 45012095 and 45012104.

It is not an unprimeable number, because it can be changed into a prime (45012131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14695 + ... + 17491.

Almost surely, 2^45012121 is an apocalyptic number.

It is an amenable number.

45012121 is a deficient number, since it is larger than the sum of its proper divisors (14529319).

45012121 is a wasteful number, since it uses less digits than its factorization.

45012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845 (or 2834 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 45012121 is about 6709.1073176690. The cubic root of 45012121 is about 355.7212632145.

Adding to 45012121 its reverse (12121054), we get a palindrome (57133175).

The spelling of 45012121 in words is "forty-five million, twelve thousand, one hundred twenty-one".