1253912669 has 4 divisors (see below), whose sum is σ = 1254278844. Its totient is φ = 1253546496.

The previous prime is 1253912651. The next prime is 1253912711. The reversal of 1253912669 is 9662193521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 414651769 + 839260900 = 20363^2 + 28970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253912669 - 2¹² = 1253908573 is a prime.

It is a super-2 number, since 2×1253912669² = 3144593962957407122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253912369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177902 + ... + 184815.

It is an arithmetic number, because the mean of its divisors is an integer number (313569711).

Almost surely, 2^1253912669 is an apocalyptic number.

It is an amenable number.

1253912669 is a deficient number, since it is larger than the sum of its proper divisors (366175).

1253912669 is an equidigital number, since it uses as much as digits as its factorization.

1253912669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366174.

The product of its digits is 174960, while the sum is 44.

The square root of 1253912669 is about 35410.6293222812. The cubic root of 1253912669 is about 1078.3401196606.

The spelling of 1253912669 in words is "one billion, two hundred fifty-three million, nine hundred twelve thousand, six hundred sixty-nine".