1290423086 has 4 divisors (see below), whose sum is σ = 1935634632. Its totient is φ = 645211542.

The previous prime is 1290423067. The next prime is 1290423091. The reversal of 1290423086 is 6803240921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6803240921 = 101 ⋅67358821.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322605770 + ... + 322605773.

It is an arithmetic number, because the mean of its divisors is an integer number (483908658).

Almost surely, 2^1290423086 is an apocalyptic number.

1290423086 is a deficient number, since it is larger than the sum of its proper divisors (645211546).

1290423086 is an equidigital number, since it uses as much as digits as its factorization.

1290423086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645211545.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1290423086 is about 35922.4593534463. The cubic root of 1290423086 is about 1088.7062297517.

The spelling of 1290423086 in words is "one billion, two hundred ninety million, four hundred twenty-three thousand, eighty-six".