121602440 has 16 divisors (see below), whose sum is σ = 273605580. Its totient is φ = 48640960.

The previous prime is 121602431. The next prime is 121602487. The reversal of 121602440 is 44206121.

It can be written as a sum of positive squares in 2 ways, for example, as 121396324 + 206116 = 11018^2 + 454^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519991 + ... + 1520070.

Almost surely, 2^121602440 is an apocalyptic number.

121602440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121602440 is an abundant number, since it is smaller than the sum of its proper divisors (152003140).

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

121602440 is a wasteful number, since it uses less digits than its factorization.

121602440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040072 (or 3040068 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 121602440 is about 11027.3496362453. The cubic root of 121602440 is about 495.4282455274.

Adding to 121602440 its reverse (44206121), we get a palindrome (165808561).

The spelling of 121602440 in words is "one hundred twenty-one million, six hundred two thousand, four hundred forty".