1252540240 has 80 divisors (see below), whose sum is σ = 3334286592. Its totient is φ = 428654592.

The previous prime is 1252540231. The next prime is 1252540273. The reversal of 1252540240 is 420452521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 360592 + ... + 364048.

Almost surely, 2^1252540240 is an apocalyptic number.

1252540240 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 1252540240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667143296).

1252540240 is an abundant number, since it is smaller than the sum of its proper divisors (2081746352).

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

1252540240 is a wasteful number, since it uses less digits than its factorization.

1252540240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124 (or 4118 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1252540240 is about 35391.2452451168. The cubic root of 1252540240 is about 1077.9465554305.

Adding to 1252540240 its reverse (420452521), we get a palindrome (1672992761).

The spelling of 1252540240 in words is "one billion, two hundred fifty-two million, five hundred forty thousand, two hundred forty".