1261592426 has 8 divisors (see below), whose sum is σ = 1892648160. Its totient is φ = 630709708.

The previous prime is 1261592407. The next prime is 1261592459. The reversal of 1261592426 is 6242951621.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1261592426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23156 + ... + 55311.

It is an arithmetic number, because the mean of its divisors is an integer number (236581020).

Almost surely, 2^1261592426 is an apocalyptic number.

1261592426 is a deficient number, since it is larger than the sum of its proper divisors (631055734).

1261592426 is an equidigital number, since it uses as much as digits as its factorization.

1261592426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86508.

The product of its digits is 51840, while the sum is 38.

The square root of 1261592426 is about 35518.9023760589. The cubic root of 1261592426 is about 1080.5371202306.

The spelling of 1261592426 in words is "one billion, two hundred sixty-one million, five hundred ninety-two thousand, four hundred twenty-six".