1250825840 has 80 divisors (see below), whose sum is σ = 3190483296. Its totient is φ = 452275200.

The previous prime is 1250825837. The next prime is 1250825857. The reversal of 1250825840 is 485280521.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1250825840.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 155354 + ... + 163206.

Almost surely, 2^1250825840 is an apocalyptic number.

1250825840 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 1250825840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1595241648).

1250825840 is an abundant number, since it is smaller than the sum of its proper divisors (1939657456).

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

1250825840 is a wasteful number, since it uses less digits than its factorization.

1250825840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058 (or 8052 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 1250825840 is about 35367.0162722274. The cubic root of 1250825840 is about 1077.4545219042.

The spelling of 1250825840 in words is "one billion, two hundred fifty million, eight hundred twenty-five thousand, eight hundred forty".