1290268399 has 8 divisors (see below), whose sum is σ = 1476472448. Its totient is φ = 1104534360.

The previous prime is 1290268367. The next prime is 1290268417. The reversal of 1290268399 is 9938620921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1290268399 - 2⁵ = 1290268367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290268339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111597 + ... + 122614.

It is an arithmetic number, because the mean of its divisors is an integer number (184559056).

Almost surely, 2^1290268399 is an apocalyptic number.

1290268399 is a deficient number, since it is larger than the sum of its proper divisors (186204049).

1290268399 is an equidigital number, since it uses as much as digits as its factorization.

1290268399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235005.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 1290268399 is about 35920.3062208551. The cubic root of 1290268399 is about 1088.6627258208.

The spelling of 1290268399 in words is "one billion, two hundred ninety million, two hundred sixty-eight thousand, three hundred ninety-nine".