1252926789 has 8 divisors (see below), whose sum is σ = 1679902560. Its totient is φ = 830617776.

The previous prime is 1252926767. The next prime is 1252926791. The reversal of 1252926789 is 9876292521.

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

It is not a de Polignac number, because 1252926789 - 2⁵ = 1252926757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252926739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166062 + ... + 1167135.

It is an arithmetic number, because the mean of its divisors is an integer number (209987820).

Almost surely, 2^1252926789 is an apocalyptic number.

It is an amenable number.

1252926789 is a deficient number, since it is larger than the sum of its proper divisors (426975771).

1252926789 is a wasteful number, since it uses less digits than its factorization.

1252926789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333379.

The product of its digits is 1088640, while the sum is 51.

The square root of 1252926789 is about 35396.7059060585. The cubic root of 1252926789 is about 1078.0574331208.

The spelling of 1252926789 in words is "one billion, two hundred fifty-two million, nine hundred twenty-six thousand, seven hundred eighty-nine".