121742525 has 12 divisors (see below), whose sum is σ = 159841332. Its totient is φ = 91664640.

The previous prime is 121742513. The next prime is 121742561. The reversal of 121742525 is 525247121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 103684 + 121638841 = 322^2 + 11029^2 .

It is not a de Polignac number, because 121742525 - 2⁶ = 121742461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142802 + ... + 143651.

It is an arithmetic number, because the mean of its divisors is an integer number (13320111).

Almost surely, 2^121742525 is an apocalyptic number.

It is an amenable number.

121742525 is a deficient number, since it is larger than the sum of its proper divisors (38098807).

121742525 is a wasteful number, since it uses less digits than its factorization.

121742525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286480 (or 286475 counting only the distinct ones).

The product of its digits is 5600, while the sum is 29.

The square root of 121742525 is about 11033.6995155750. The cubic root of 121742525 is about 495.6184155947.

Adding to 121742525 its reverse (525247121), we get a palindrome (646989646).

The spelling of 121742525 in words is "one hundred twenty-one million, seven hundred forty-two thousand, five hundred twenty-five".