545121252 has 240 divisors, whose sum is σ = 1700721792. Its totient is φ = 150543360.

The previous prime is 545121209. The next prime is 545121253. The reversal of 545121252 is 252121545.

It is a Harshad number since it is a multiple of its sum of digits (27).

545121252 is a Rhonda number in base 10.

Its product of digits (4000) is a multiple of the sum of its prime factors (400).

It is not an unprimeable number, because it can be changed into a prime (545121253) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1646727 + ... + 1647057.

Almost surely, 2^545121252 is an apocalyptic number.

545121252 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545121252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850360896).

545121252 is an abundant number, since it is smaller than the sum of its proper divisors (1155600540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

545121252 is a wasteful number, since it uses less digits than its factorization.

545121252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 389 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 545121252 is about 23347.8318479468. The cubic root of 545121252 is about 816.8914889192.

Adding to 545121252 its reverse (252121545), we get a palindrome (797242797).

The spelling of 545121252 in words is "five hundred forty-five million, one hundred twenty-one thousand, two hundred fifty-two".