1435422721 has 2 divisors, whose sum is σ = 1435422722. Its totient is φ = 1435422720.

The previous prime is 1435422701. The next prime is 1435422731. The reversal of 1435422721 is 1272245341.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1126542096 + 308880625 = 33564^2 + 17575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1435422721 - 2²⁵ = 1401868289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1435422701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 717711360 + 717711361.

It is an arithmetic number, because the mean of its divisors is an integer number (717711361).

Almost surely, 2^1435422721 is an apocalyptic number.

It is an amenable number.

1435422721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1435422721 is an equidigital number, since it uses as much as digits as its factorization.

1435422721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 31.

The square root of 1435422721 is about 37886.9729722500. The cubic root of 1435422721 is about 1128.0454689789.

The spelling of 1435422721 in words is "one billion, four hundred thirty-five million, four hundred twenty-two thousand, seven hundred twenty-one".