1261426322 has 8 divisors (see below), whose sum is σ = 2037688716. Its totient is φ = 582196752.

The previous prime is 1261426319. The next prime is 1261426409. The reversal of 1261426322 is 2236241621.

It can be written as a sum of positive squares in 2 ways, for example, as 1259469121 + 1957201 = 35489^2 + 1399^2 .

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

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, 24258173 + ... + 24258224.

Almost surely, 2^1261426322 is an apocalyptic number.

1261426322 is a deficient number, since it is larger than the sum of its proper divisors (776262394).

1261426322 is a wasteful number, since it uses less digits than its factorization.

1261426322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48516412.

The product of its digits is 6912, while the sum is 29.

The square root of 1261426322 is about 35516.5640511579. The cubic root of 1261426322 is about 1080.4896961942.

Adding to 1261426322 its reverse (2236241621), we get a palindrome (3497667943).

The spelling of 1261426322 in words is "one billion, two hundred sixty-one million, four hundred twenty-six thousand, three hundred twenty-two".