1354642721 has 2 divisors, whose sum is σ = 1354642722. Its totient is φ = 1354642720.

The previous prime is 1354642669. The next prime is 1354642727. The reversal of 1354642721 is 1272464531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218010000 + 136632721 = 34900^2 + 11689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1354642721 - 2⁶ = 1354642657 is a prime.

It is not a weakly prime, because it can be changed into another prime (1354642727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677321360 + 677321361.

It is an arithmetic number, because the mean of its divisors is an integer number (677321361).

Almost surely, 2^1354642721 is an apocalyptic number.

It is an amenable number.

1354642721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1354642721 is an equidigital number, since it uses as much as digits as its factorization.

1354642721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 1354642721 is about 36805.4713459833. The cubic root of 1354642721 is about 1106.4749577901.

The spelling of 1354642721 in words is "one billion, three hundred fifty-four million, six hundred forty-two thousand, seven hundred twenty-one".