545402121 has 16 divisors (see below), whose sum is σ = 801171648. Its totient is φ = 327272000.

The previous prime is 545402111. The next prime is 545402129. The reversal of 545402121 is 121204545.

It is a de Polignac number, because none of the positive numbers 2^k-545402121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 545402091 and 545402100.

It is not an unprimeable number, because it can be changed into a prime (545402129) 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, 78486 + ... + 85151.

It is an arithmetic number, because the mean of its divisors is an integer number (50073228).

Almost surely, 2^545402121 is an apocalyptic number.

It is an amenable number.

545402121 is a deficient number, since it is larger than the sum of its proper divisors (255769527).

545402121 is a wasteful number, since it uses less digits than its factorization.

545402121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163752.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 545402121 is about 23353.8459573579. The cubic root of 545402121 is about 817.0317635832.

Adding to 545402121 its reverse (121204545), we get a palindrome (666606666).

The spelling of 545402121 in words is "five hundred forty-five million, four hundred two thousand, one hundred twenty-one".