1254522661 has 4 divisors (see below), whose sum is σ = 1433740192. Its totient is φ = 1075305132.

The previous prime is 1254522653. The next prime is 1254522683. The reversal of 1254522661 is 1662254521.

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: 1662254521 = 113 ⋅14710217.

It is a cyclic number.

It is not a de Polignac number, because 1254522661 - 2³ = 1254522653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254522611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89608755 + ... + 89608768.

It is an arithmetic number, because the mean of its divisors is an integer number (358435048).

Almost surely, 2^1254522661 is an apocalyptic number.

It is an amenable number.

1254522661 is a deficient number, since it is larger than the sum of its proper divisors (179217531).

1254522661 is an equidigital number, since it uses as much as digits as its factorization.

1254522661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179217530.

The product of its digits is 28800, while the sum is 34.

The square root of 1254522661 is about 35419.2413950384. The cubic root of 1254522661 is about 1078.5149516692.

The spelling of 1254522661 in words is "one billion, two hundred fifty-four million, five hundred twenty-two thousand, six hundred sixty-one".