1250005140 has 72 divisors (see below), whose sum is σ = 3794612640. Its totient is φ = 333077184.

The previous prime is 1250005139. The next prime is 1250005181. The reversal of 1250005140 is 415000521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 390627 + ... + 393813.

Almost surely, 2^1250005140 is an apocalyptic number.

1250005140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1250005140 is an abundant number, since it is smaller than the sum of its proper divisors (2544607500).

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

1250005140 is a wasteful number, since it uses less digits than its factorization.

1250005140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381 (or 5376 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1250005140 is about 35355.4117498298. The cubic root of 1250005140 is about 1077.2188215198.

Adding to 1250005140 its reverse (415000521), we get a palindrome (1665005661).

The spelling of 1250005140 in words is "one billion, two hundred fifty million, five thousand, one hundred forty".