121502525 has 6 divisors (see below), whose sum is σ = 150663162. Its totient is φ = 97202000.

The previous prime is 121502509. The next prime is 121502527. The reversal of 121502525 is 525205121.

It can be written as a sum of positive squares in 3 ways, for example, as 568516 + 120934009 = 754^2 + 10997^2 .

It is not a de Polignac number, because 121502525 - 2⁴ = 121502509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121502525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121502527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2430026 + ... + 2430075.

It is an arithmetic number, because the mean of its divisors is an integer number (25110527).

Almost surely, 2^121502525 is an apocalyptic number.

It is an amenable number.

121502525 is a deficient number, since it is larger than the sum of its proper divisors (29160637).

121502525 is an equidigital number, since it uses as much as digits as its factorization.

121502525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4860111 (or 4860106 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 121502525 is about 11022.8183782552. The cubic root of 121502525 is about 495.2925183254.

Adding to 121502525 its reverse (525205121), we get a palindrome (646707646).

The spelling of 121502525 in words is "one hundred twenty-one million, five hundred two thousand, five hundred twenty-five".