45210121 has 16 divisors (see below), whose sum is σ = 51245568. Its totient is φ = 39513600.

The previous prime is 45210119. The next prime is 45210127. The reversal of 45210121 is 12101254.

It is a cyclic number.

It is not a de Polignac number, because 45210121 - 2¹ = 45210119 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 = 45210095 and 45210104.

It is not an unprimeable number, because it can be changed into a prime (45210127) 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, 66841 + ... + 67513.

It is an arithmetic number, because the mean of its divisors is an integer number (3202848).

Almost surely, 2^45210121 is an apocalyptic number.

It is an amenable number.

45210121 is a deficient number, since it is larger than the sum of its proper divisors (6035447).

45210121 is a wasteful number, since it uses less digits than its factorization.

45210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912.

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

The square root of 45210121 is about 6723.8471874367. The cubic root of 45210121 is about 356.2420843219.

Adding to 45210121 its reverse (12101254), we get a palindrome (57311375).

It can be divided in two parts, 4 and 5210121, that added together give a palindrome (5210125).

The spelling of 45210121 in words is "forty-five million, two hundred ten thousand, one hundred twenty-one".