1242399360 has 128 divisors (see below), whose sum is σ = 4168699200. Its totient is φ = 313860096.

The previous prime is 1242399329. The next prime is 1242399371. The reversal of 1242399360 is 639932421.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19452 + ... + 53508.

Almost surely, 2^1242399360 is an apocalyptic number.

1242399360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242399360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2084349600).

1242399360 is an abundant number, since it is smaller than the sum of its proper divisors (2926299840).

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

1242399360 is a wasteful number, since it uses less digits than its factorization.

1242399360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34098 (or 34086 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 1242399360 is about 35247.6858814873. The cubic root of 1242399360 is about 1075.0295603914.

The spelling of 1242399360 in words is "one billion, two hundred forty-two million, three hundred ninety-nine thousand, three hundred sixty".