1421457361 has 2 divisors, whose sum is σ = 1421457362. Its totient is φ = 1421457360.

The previous prime is 1421457347. The next prime is 1421457409. The reversal of 1421457361 is 1637541241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1389872961 + 31584400 = 37281^2 + 5620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421457361 - 2¹¹ = 1421455313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421457341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710728680 + 710728681.

It is an arithmetic number, because the mean of its divisors is an integer number (710728681).

Almost surely, 2^1421457361 is an apocalyptic number.

It is an amenable number.

1421457361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421457361 is an equidigital number, since it uses as much as digits as its factorization.

1421457361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 1421457361 is about 37702.2195765714. The cubic root of 1421457361 is about 1124.3752543756.

The spelling of 1421457361 in words is "one billion, four hundred twenty-one million, four hundred fifty-seven thousand, three hundred sixty-one".