1252806646 has 16 divisors (see below), whose sum is σ = 2312874144. Its totient is φ = 495615744.

The previous prime is 1252806637. The next prime is 1252806647. The reversal of 1252806646 is 6466082521.

It is a junction number, because it is equal to n+sod(n) for n = 1252806599 and 1252806608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252806647) 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, 3441595 + ... + 3441958.

It is an arithmetic number, because the mean of its divisors is an integer number (144554634).

Almost surely, 2^1252806646 is an apocalyptic number.

1252806646 is a deficient number, since it is larger than the sum of its proper divisors (1060067498).

1252806646 is a wasteful number, since it uses less digits than its factorization.

1252806646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6883575.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 1252806646 is about 35395.0087724244. The cubic root of 1252806646 is about 1078.0229737532.

The spelling of 1252806646 in words is "one billion, two hundred fifty-two million, eight hundred six thousand, six hundred forty-six".