121430864 has 30 divisors (see below), whose sum is σ = 249935454. Its totient is φ = 57141760.

The previous prime is 121430863. The next prime is 121430893. The reversal of 121430864 is 468034121.

It can be written as a sum of positive squares in 3 ways, for example, as 13104400 + 108326464 = 3620^2 + 10408^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430861) 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, 8507 + ... + 17754.

Almost surely, 2^121430864 is an apocalyptic number.

It is an amenable number.

121430864 is an abundant number, since it is smaller than the sum of its proper divisors (128504590).

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

121430864 is a wasteful number, since it uses less digits than its factorization.

121430864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26303 (or 26280 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 121430864 is about 11019.5673236294. The cubic root of 121430864 is about 495.1951262827.

Adding to 121430864 its reverse (468034121), we get a palindrome (589464985).

The spelling of 121430864 in words is "one hundred twenty-one million, four hundred thirty thousand, eight hundred sixty-four".