1250011000 has 128 divisors (see below), whose sum is σ = 3360015360. Its totient is φ = 426384000.

The previous prime is 1250010991. The next prime is 1250011031. The reversal of 1250011000 is 1100521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1980685 + ... + 1981315.

It is an arithmetic number, because the mean of its divisors is an integer number (26250120).

Almost surely, 2^1250011000 is an apocalyptic number.

1250011000 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 1250011000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1680007680).

1250011000 is an abundant number, since it is smaller than the sum of its proper divisors (2110004360).

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

1250011000 is a wasteful number, since it uses less digits than its factorization.

1250011000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 1250011000 is about 35355.4946224770. The cubic root of 1250011000 is about 1077.2205048442.

Adding to 1250011000 its reverse (1100521), we get a palindrome (1251111521).

The spelling of 1250011000 in words is "one billion, two hundred fifty million, eleven thousand".