1250001389 has 16 divisors (see below), whose sum is σ = 1539863808. Its totient is φ = 988111872.

The previous prime is 1250001383. The next prime is 1250001397. The reversal of 1250001389 is 9831000521.

It is a cyclic number.

It is not a de Polignac number, because 1250001389 - 2⁸ = 1250001133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1250001383) 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 15 ways as a sum of consecutive naturals, for example, 105104 + ... + 116390.

It is an arithmetic number, because the mean of its divisors is an integer number (96241488).

Almost surely, 2^1250001389 is an apocalyptic number.

It is an amenable number.

1250001389 is a deficient number, since it is larger than the sum of its proper divisors (289862419).

1250001389 is a wasteful number, since it uses less digits than its factorization.

1250001389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12524.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1250001389 is about 35355.3587027483. The cubic root of 1250001389 is about 1077.2177440171.

The spelling of 1250001389 in words is "one billion, two hundred fifty million, one thousand, three hundred eighty-nine".