1290246401 has 4 divisors (see below), whose sum is σ = 1290472404. Its totient is φ = 1290020400.

The previous prime is 1290246389. The next prime is 1290246413. The reversal of 1290246401 is 1046420921.

It is a Cunningham number, because it is equal to 35920²+1.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1290246389) and next prime (1290246413).

It can be written as a sum of positive squares in 2 ways, for example, as 582739600 + 707506801 = 24140^2 + 26599^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290246401 - 2³⁰ = 216504577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1290246101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104210 + ... + 115931.

It is an arithmetic number, because the mean of its divisors is an integer number (322618101).

Almost surely, 2^1290246401 is an apocalyptic number.

It is an amenable number.

1290246401 is a deficient number, since it is larger than the sum of its proper divisors (226003).

1290246401 is an equidigital number, since it uses as much as digits as its factorization.

1290246401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226002.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1290246401 is about 35920.0000139198. Note that the first 4 decimals coincide. The cubic root of 1290246401 is about 1088.6565388552.

The spelling of 1290246401 in words is "one billion, two hundred ninety million, two hundred forty-six thousand, four hundred one".