1240255900 has 36 divisors (see below), whose sum is σ = 2898385672. Its totient is φ = 457940160.

The previous prime is 1240255853. The next prime is 1240255901. The reversal of 1240255900 is 95520421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240255901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475722 + ... + 478321.

Almost surely, 2^1240255900 is an apocalyptic number.

1240255900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240255900 is an abundant number, since it is smaller than the sum of its proper divisors (1658129772).

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

1240255900 is a wasteful number, since it uses less digits than its factorization.

1240255900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954070 (or 954063 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1240255900 is about 35217.2670717079. The cubic root of 1240255900 is about 1074.4109698993.

The spelling of 1240255900 in words is "one billion, two hundred forty million, two hundred fifty-five thousand, nine hundred".