1252042161 has 8 divisors (see below), whose sum is σ = 1700887680. Its totient is φ = 818945712.

The previous prime is 1252042151. The next prime is 1252042177. The reversal of 1252042161 is 1612402521.

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

It is not a de Polignac number, because 1252042161 - 2⁶ = 1252042097 is a prime.

It is a super-3 number, since 3×1252042161³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1252042111) 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, 3937081 + ... + 3937398.

It is an arithmetic number, because the mean of its divisors is an integer number (212610960).

Almost surely, 2^1252042161 is an apocalyptic number.

It is an amenable number.

1252042161 is a deficient number, since it is larger than the sum of its proper divisors (448845519).

1252042161 is an equidigital number, since it uses as much as digits as its factorization.

1252042161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7874535.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1252042161 is about 35384.2077910471. The cubic root of 1252042161 is about 1077.8036528426.

Adding to 1252042161 its reverse (1612402521), we get a palindrome (2864444682).

The spelling of 1252042161 in words is "one billion, two hundred fifty-two million, forty-two thousand, one hundred sixty-one".