121634536 has 16 divisors (see below), whose sum is σ = 233627940. Its totient is φ = 59333760.

The previous prime is 121634533. The next prime is 121634551. The reversal of 121634536 is 635436121.

It can be written as a sum of positive squares in 2 ways, for example, as 85562500 + 36072036 = 9250^2 + 6006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121634498 and 121634507.

It is not an unprimeable number, because it can be changed into a prime (121634533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185091 + ... + 185746.

Almost surely, 2^121634536 is an apocalyptic number.

It is an amenable number.

121634536 is a deficient number, since it is larger than the sum of its proper divisors (111993404).

121634536 is a wasteful number, since it uses less digits than its factorization.

121634536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370884 (or 370880 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 121634536 is about 11028.8048309869. The cubic root of 121634536 is about 495.4718298123.

The spelling of 121634536 in words is "one hundred twenty-one million, six hundred thirty-four thousand, five hundred thirty-six".