1252771617 has 4 divisors (see below), whose sum is σ = 1670362160. Its totient is φ = 835181076.

The previous prime is 1252771573. The next prime is 1252771627. The reversal of 1252771617 is 7161772521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7161772521 = 3 ⋅2387257507.

It is not a de Polignac number, because 1252771617 - 2¹⁴ = 1252755233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252771627) 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, 208795267 + ... + 208795272.

It is an arithmetic number, because the mean of its divisors is an integer number (417590540).

Almost surely, 2^1252771617 is an apocalyptic number.

It is an amenable number.

1252771617 is a deficient number, since it is larger than the sum of its proper divisors (417590543).

1252771617 is an equidigital number, since it uses as much as digits as its factorization.

1252771617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417590542.

The product of its digits is 41160, while the sum is 39.

The square root of 1252771617 is about 35394.5139393099. The cubic root of 1252771617 is about 1078.0129263345.

The spelling of 1252771617 in words is "one billion, two hundred fifty-two million, seven hundred seventy-one thousand, six hundred seventeen".