1240869520 has 60 divisors (see below), whose sum is σ = 3171164220. Its totient is φ = 451221760.

The previous prime is 1240869517. The next prime is 1240869523. The reversal of 1240869520 is 259680421.

It is an interprime number because it is at equal distance from previous prime (1240869517) and next prime (1240869523).

It can be written as a sum of positive squares in 2 ways, for example, as 978688656 + 262180864 = 31284^2 + 16192^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1240869520.

It is not an unprimeable number, because it can be changed into a prime (1240869523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54415 + ... + 73774.

It is an arithmetic number, because the mean of its divisors is an integer number (52852737).

Almost surely, 2^1240869520 is an apocalyptic number.

1240869520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240869520 is an abundant number, since it is smaller than the sum of its proper divisors (1930294700).

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

1240869520 is a wasteful number, since it uses less digits than its factorization.

1240869520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128224 (or 128207 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1240869520 is about 35225.9779140338. The cubic root of 1240869520 is about 1074.5881299414.

The spelling of 1240869520 in words is "one billion, two hundred forty million, eight hundred sixty-nine thousand, five hundred twenty".