1250145809 has 8 divisors (see below), whose sum is σ = 1392812928. Its totient is φ = 1112314960.

The previous prime is 1250145791. The next prime is 1250145811. The reversal of 1250145809 is 9085410521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1250145809 - 2⁸ = 1250145553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1250145829) 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, 1208522 + ... + 1209555.

It is an arithmetic number, because the mean of its divisors is an integer number (174101616).

Almost surely, 2^1250145809 is an apocalyptic number.

It is an amenable number.

1250145809 is a deficient number, since it is larger than the sum of its proper divisors (142667119).

1250145809 is a wasteful number, since it uses less digits than its factorization.

1250145809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418135.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 1250145809 is about 35357.4010498509. The cubic root of 1250145809 is about 1077.2592281832.

The spelling of 1250145809 in words is "one billion, two hundred fifty million, one hundred forty-five thousand, eight hundred nine".