1252689919 has 8 divisors (see below), whose sum is σ = 1377754560. Its totient is φ = 1131725856.

The previous prime is 1252689899. The next prime is 1252689953. The reversal of 1252689919 is 9199862521.

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 1252689919 - 2⁷ = 1252689791 is a prime.

It is a super-2 number, since 2×1252689919² = 3138464066328453122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252689979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1024504 + ... + 1025725.

It is an arithmetic number, because the mean of its divisors is an integer number (172219320).

Almost surely, 2^1252689919 is an apocalyptic number.

1252689919 is a deficient number, since it is larger than the sum of its proper divisors (125064641).

1252689919 is a wasteful number, since it uses less digits than its factorization.

1252689919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050289.

The product of its digits is 699840, while the sum is 52.

The square root of 1252689919 is about 35393.3598150840. The cubic root of 1252689919 is about 1077.9894920513.

The spelling of 1252689919 in words is "one billion, two hundred fifty-two million, six hundred eighty-nine thousand, nine hundred nineteen".