1254442661 has 8 divisors (see below), whose sum is σ = 1270212384. Its totient is φ = 1238688720.

The previous prime is 1254442649. The next prime is 1254442663. The reversal of 1254442661 is 1662444521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1254442661 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 (1254442663) 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, 292271 + ... + 296531.

It is an arithmetic number, because the mean of its divisors is an integer number (158776548).

Almost surely, 2^1254442661 is an apocalyptic number.

It is an amenable number.

1254442661 is a deficient number, since it is larger than the sum of its proper divisors (15769723).

1254442661 is an equidigital number, since it uses as much as digits as its factorization.

1254442661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7891.

The product of its digits is 46080, while the sum is 35.

The square root of 1254442661 is about 35418.1120473692. The cubic root of 1254442661 is about 1078.4920258099.

The spelling of 1254442661 in words is "one billion, two hundred fifty-four million, four hundred forty-two thousand, six hundred sixty-one".