1240452312 has 96 divisors (see below), whose sum is σ = 3452467200. Its totient is φ = 371067840.

The previous prime is 1240452299. The next prime is 1240452319. The reversal of 1240452312 is 2132540421.

It is a super-2 number, since 2×1240452312² = 3077443876692290688, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240452319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226713 + ... + 232119.

It is an arithmetic number, because the mean of its divisors is an integer number (35963200).

Almost surely, 2^1240452312 is an apocalyptic number.

1240452312 is a gapful number since it is divisible by the number (12) 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 1240452312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1726233600).

1240452312 is an abundant number, since it is smaller than the sum of its proper divisors (2212014888).

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

1240452312 is a wasteful number, since it uses less digits than its factorization.

1240452312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517 (or 5502 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1240452312 is about 35220.0555365831. The cubic root of 1240452312 is about 1074.4676829451.

Adding to 1240452312 its reverse (2132540421), we get a palindrome (3372992733).

The spelling of 1240452312 in words is "one billion, two hundred forty million, four hundred fifty-two thousand, three hundred twelve".