115421240 has 32 divisors (see below), whose sum is σ = 283307760. Its totient is φ = 41971200.

The previous prime is 115421239. The next prime is 115421281. The reversal of 115421240 is 42124511.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130721 + ... + 131600.

Almost surely, 2^115421240 is an apocalyptic number.

115421240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115421240 is an abundant number, since it is smaller than the sum of its proper divisors (167886520).

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

115421240 is a wasteful number, since it uses less digits than its factorization.

115421240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262343 (or 262339 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 115421240 is about 10743.4277584019. The cubic root of 115421240 is about 486.8874480414.

Adding to 115421240 its reverse (42124511), we get a palindrome (157545751).

The spelling of 115421240 in words is "one hundred fifteen million, four hundred twenty-one thousand, two hundred forty".