1494201641 has 2 divisors, whose sum is σ = 1494201642. Its totient is φ = 1494201640.

The previous prime is 1494201637. The next prime is 1494201661. The reversal of 1494201641 is 1461024941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 847974400 + 646227241 = 29120^2 + 25421^2 .

It is a cyclic number.

It is not a de Polignac number, because 1494201641 - 2² = 1494201637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1494201598 and 1494201607.

It is not a weakly prime, because it can be changed into another prime (1494201661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 747100820 + 747100821.

It is an arithmetic number, because the mean of its divisors is an integer number (747100821).

Almost surely, 2^1494201641 is an apocalyptic number.

It is an amenable number.

1494201641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1494201641 is an equidigital number, since it uses as much as digits as its factorization.

1494201641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1494201641 is about 38654.9044883052. The cubic root of 1494201641 is about 1143.2373458692.

The spelling of 1494201641 in words is "one billion, four hundred ninety-four million, two hundred one thousand, six hundred forty-one".