121635764 has 6 divisors (see below), whose sum is σ = 212862594. Its totient is φ = 60817880.

The previous prime is 121635763. The next prime is 121635791. The reversal of 121635764 is 467536121.

It can be written as a sum of positive squares in only one way, i.e., 121440400 + 195364 = 11020^2 + 442^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121635763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15204467 + ... + 15204474.

It is an arithmetic number, because the mean of its divisors is an integer number (35477099).

Almost surely, 2^121635764 is an apocalyptic number.

It is an amenable number.

121635764 is a deficient number, since it is larger than the sum of its proper divisors (91226830).

121635764 is a wasteful number, since it uses less digits than its factorization.

121635764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30408945 (or 30408943 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 121635764 is about 11028.8605032433. The cubic root of 121635764 is about 495.4734972043.

The spelling of 121635764 in words is "one hundred twenty-one million, six hundred thirty-five thousand, seven hundred sixty-four".