1242053641 has 2 divisors, whose sum is σ = 1242053642. Its totient is φ = 1242053640.

The previous prime is 1242053633. The next prime is 1242053699. The reversal of 1242053641 is 1463502421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 942244416 + 299809225 = 30696^2 + 17315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242053641 - 2³ = 1242053633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242053621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621026820 + 621026821.

It is an arithmetic number, because the mean of its divisors is an integer number (621026821).

Almost surely, 2^1242053641 is an apocalyptic number.

It is an amenable number.

1242053641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242053641 is an equidigital number, since it uses as much as digits as its factorization.

1242053641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1242053641 is about 35242.7814027213. The cubic root of 1242053641 is about 1074.9298359830.

The spelling of 1242053641 in words is "one billion, two hundred forty-two million, fifty-three thousand, six hundred forty-one".