1242312144 has 40 divisors (see below), whose sum is σ = 3210568320. Its totient is φ = 413941248.

The previous prime is 1242312109. The next prime is 1242312157. The reversal of 1242312144 is 4412132421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

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, 237849 + ... + 243015.

It is an arithmetic number, because the mean of its divisors is an integer number (80264208).

Almost surely, 2^1242312144 is an apocalyptic number.

It is an amenable number.

1242312144 is an abundant number, since it is smaller than the sum of its proper divisors (1968256176).

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

1242312144 is a wasteful number, since it uses less digits than its factorization.

1242312144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187 (or 10181 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 1242312144 is about 35246.4486721712. The cubic root of 1242312144 is about 1075.0044042365.

Adding to 1242312144 its reverse (4412132421), we get a palindrome (5654444565).

The spelling of 1242312144 in words is "one billion, two hundred forty-two million, three hundred twelve thousand, one hundred forty-four".