121502440 has 16 divisors (see below), whose sum is σ = 273380580. Its totient is φ = 48600960.

The previous prime is 121502419. The next prime is 121502443. The reversal of 121502440 is 44205121.

It can be written as a sum of positive squares in 2 ways, for example, as 121484484 + 17956 = 11022^2 + 134^2 .

It is not an unprimeable number, because it can be changed into a prime (121502443) 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, 1518741 + ... + 1518820.

Almost surely, 2^121502440 is an apocalyptic number.

121502440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121502440 is an abundant number, since it is smaller than the sum of its proper divisors (151878140).

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

121502440 is a wasteful number, since it uses less digits than its factorization.

121502440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037572 (or 3037568 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 121502440 is about 11022.8145226163. The cubic root of 121502440 is about 495.2924028274.

Adding to 121502440 its reverse (44205121), we get a palindrome (165707561).

The spelling of 121502440 in words is "one hundred twenty-one million, five hundred two thousand, four hundred forty".