1391212426 has 8 divisors (see below), whose sum is σ = 2090810304. Its totient is φ = 694275660.

The previous prime is 1391212409. The next prime is 1391212441. The reversal of 1391212426 is 6242121931.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663970 + ... + 666061.

It is an arithmetic number, because the mean of its divisors is an integer number (261351288).

Almost surely, 2^1391212426 is an apocalyptic number.

1391212426 is a deficient number, since it is larger than the sum of its proper divisors (699597878).

1391212426 is a wasteful number, since it uses less digits than its factorization.

1391212426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330556.

The product of its digits is 5184, while the sum is 31.

The square root of 1391212426 is about 37298.9601195529. The cubic root of 1391212426 is about 1116.3434177550.

The spelling of 1391212426 in words is "one billion, three hundred ninety-one million, two hundred twelve thousand, four hundred twenty-six".