1427254721 has 4 divisors (see below), whose sum is σ = 1427371092. Its totient is φ = 1427138352.

The previous prime is 1427254657. The next prime is 1427254757. The reversal of 1427254721 is 1274527241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1411054096 + 16200625 = 37564^2 + 4025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427254721 - 2⁶ = 1427254657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427254421) 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 3 ways as a sum of consecutive naturals, for example, 37286 + ... + 65151.

It is an arithmetic number, because the mean of its divisors is an integer number (356842773).

Almost surely, 2^1427254721 is an apocalyptic number.

It is an amenable number.

1427254721 is a deficient number, since it is larger than the sum of its proper divisors (116371).

1427254721 is a wasteful number, since it uses less digits than its factorization.

1427254721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116370.

The product of its digits is 31360, while the sum is 35.

The square root of 1427254721 is about 37779.0248815398. The cubic root of 1427254721 is about 1125.9017549551.

The spelling of 1427254721 in words is "one billion, four hundred twenty-seven million, two hundred fifty-four thousand, seven hundred twenty-one".