1252660161 has 8 divisors (see below), whose sum is σ = 1673935200. Its totient is φ = 833245952.

The previous prime is 1252660091. The next prime is 1252660223. The reversal of 1252660161 is 1610662521.

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 1252660161 - 2⁷ = 1252660033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1252660061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463635 + ... + 466328.

It is an arithmetic number, because the mean of its divisors is an integer number (209241900).

Almost surely, 2^1252660161 is an apocalyptic number.

It is an amenable number.

1252660161 is a deficient number, since it is larger than the sum of its proper divisors (421275039).

1252660161 is an equidigital number, since it uses as much as digits as its factorization.

1252660161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930415.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1252660161 is about 35392.9394229979. The cubic root of 1252660161 is about 1077.9809560029.

The spelling of 1252660161 in words is "one billion, two hundred fifty-two million, six hundred sixty thousand, one hundred sixty-one".