1427460821 has 2 divisors, whose sum is σ = 1427460822. Its totient is φ = 1427460820.

The previous prime is 1427460767. The next prime is 1427460863. The reversal of 1427460821 is 1280647241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1100248900 + 327211921 = 33170^2 + 18089^2 .

It is an emirp because it is prime and its reverse (1280647241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1427460821 - 2¹⁴ = 1427444437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427460871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713730410 + 713730411.

It is an arithmetic number, because the mean of its divisors is an integer number (713730411).

Almost surely, 2^1427460821 is an apocalyptic number.

It is an amenable number.

1427460821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427460821 is an equidigital number, since it uses as much as digits as its factorization.

1427460821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 1427460821 is about 37781.7524871465. The cubic root of 1427460821 is about 1125.9559469129.

The spelling of 1427460821 in words is "one billion, four hundred twenty-seven million, four hundred sixty thousand, eight hundred twenty-one".