1252130440 has 128 divisors (see below), whose sum is σ = 3149280000. Its totient is φ = 444236800.

The previous prime is 1252130437. The next prime is 1252130443. The reversal of 1252130440 is 440312521.

It is an interprime number because it is at equal distance from previous prime (1252130437) and next prime (1252130443).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1252130443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4654626 + ... + 4654894.

It is an arithmetic number, because the mean of its divisors is an integer number (24603750).

Almost surely, 2^1252130440 is an apocalyptic number.

1252130440 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 1252130440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574640000).

1252130440 is an abundant number, since it is smaller than the sum of its proper divisors (1897149560).

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

1252130440 is a wasteful number, since it uses less digits than its factorization.

1252130440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1252130440 is about 35385.4552040807. The cubic root of 1252130440 is about 1077.8289835105.

Adding to 1252130440 its reverse (440312521), we get a palindrome (1692442961).

The spelling of 1252130440 in words is "one billion, two hundred fifty-two million, one hundred thirty thousand, four hundred forty".