1250521040 has 80 divisors (see below), whose sum is σ = 3049197696. Its totient is φ = 476044800.

The previous prime is 1250521039. The next prime is 1250521049. The reversal of 1250521040 is 401250521.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1250521049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386630 + ... + 389850.

Almost surely, 2^1250521040 is an apocalyptic number.

1250521040 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 1250521040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524598848).

1250521040 is an abundant number, since it is smaller than the sum of its proper divisors (1798676656).

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

1250521040 is a wasteful number, since it uses less digits than its factorization.

1250521040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468 (or 3462 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1250521040 is about 35362.7069099638. The cubic root of 1250521040 is about 1077.3669971114.

Adding to 1250521040 its reverse (401250521), we get a palindrome (1651771561).

The spelling of 1250521040 in words is "one billion, two hundred fifty million, five hundred twenty-one thousand, forty".