1250021040 has 40 divisors (see below), whose sum is σ = 3875065968. Its totient is φ = 333338880.

The previous prime is 1250021027. The next prime is 1250021041. The reversal of 1250021040 is 401200521.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1250021041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2603971 + ... + 2604450.

Almost surely, 2^1250021040 is an apocalyptic number.

1250021040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1250021040 is an abundant number, since it is smaller than the sum of its proper divisors (2625044928).

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

1250021040 is a wasteful number, since it uses less digits than its factorization.

1250021040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208437 (or 5208431 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1250021040 is about 35355.6366086088. The cubic root of 1250021040 is about 1077.2233888895.

Adding to 1250021040 its reverse (401200521), we get a palindrome (1651221561).

The spelling of 1250021040 in words is "one billion, two hundred fifty million, twenty-one thousand, forty".