1252531240 has 64 divisors (see below), whose sum is σ = 2946533760. Its totient is φ = 478283520.

The previous prime is 1252531201. The next prime is 1252531279. The reversal of 1252531240 is 421352521.

It is an interprime number because it is at equal distance from previous prime (1252531201) and next prime (1252531279).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621835 + ... + 623845.

It is an arithmetic number, because the mean of its divisors is an integer number (46039590).

Almost surely, 2^1252531240 is an apocalyptic number.

1252531240 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 1252531240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473266880).

1252531240 is an abundant number, since it is smaller than the sum of its proper divisors (1694002520).

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

1252531240 is a wasteful number, since it uses less digits than its factorization.

1252531240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722 (or 2718 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1252531240 is about 35391.1180947989. The cubic root of 1252531240 is about 1077.9439735994.

Adding to 1252531240 its reverse (421352521), we get a palindrome (1673883761).

The spelling of 1252531240 in words is "one billion, two hundred fifty-two million, five hundred thirty-one thousand, two hundred forty".