1240742900 has 18 divisors (see below), whose sum is σ = 2692412310. Its totient is φ = 496297120.

The previous prime is 1240742891. The next prime is 1240742933. The reversal of 1240742900 is 92470421.

It can be written as a sum of positive squares in 3 ways, for example, as 21196816 + 1219546084 = 4604^2 + 34922^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6203615 + ... + 6203814.

Almost surely, 2^1240742900 is an apocalyptic number.

1240742900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240742900 is an abundant number, since it is smaller than the sum of its proper divisors (1451669410).

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

1240742900 is a wasteful number, since it uses less digits than its factorization.

1240742900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12407443 (or 12407436 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1240742900 is about 35224.1806150264. The cubic root of 1240742900 is about 1074.5515778906.

The spelling of 1240742900 in words is "one billion, two hundred forty million, seven hundred forty-two thousand, nine hundred".