1240105240 has 32 divisors (see below), whose sum is σ = 3043895760. Its totient is φ = 450947200.

The previous prime is 1240105201. The next prime is 1240105253. The reversal of 1240105240 is 425010421.

It is a super-2 number, since 2×1240105240² = 3075722012550915200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1408771 + ... + 1409650.

Almost surely, 2^1240105240 is an apocalyptic number.

1240105240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240105240 is an abundant number, since it is smaller than the sum of its proper divisors (1803790520).

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

1240105240 is a wasteful number, since it uses less digits than its factorization.

1240105240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818443 (or 2818439 counting only the distinct ones).

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

The square root of 1240105240 is about 35215.1279991994. The cubic root of 1240105240 is about 1074.3674634715.

Adding to 1240105240 its reverse (425010421), we get a palindrome (1665115661).

The spelling of 1240105240 in words is "one billion, two hundred forty million, one hundred five thousand, two hundred forty".