1252909646 has 8 divisors (see below), whose sum is σ = 1897972344. Its totient is φ = 620252200.

The previous prime is 1252909643. The next prime is 1252909681. The reversal of 1252909646 is 6469092521.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1252909597 and 1252909606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252909643) 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, 3101060 + ... + 3101463.

It is an arithmetic number, because the mean of its divisors is an integer number (237246543).

Almost surely, 2^1252909646 is an apocalyptic number.

1252909646 is a deficient number, since it is larger than the sum of its proper divisors (645062698).

1252909646 is a wasteful number, since it uses less digits than its factorization.

1252909646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6202626.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 1252909646 is about 35396.4637499285. The cubic root of 1252909646 is about 1078.0525163071.

The spelling of 1252909646 in words is "one billion, two hundred fifty-two million, nine hundred nine thousand, six hundred forty-six".