1261332634 has 8 divisors (see below), whose sum is σ = 1892321748. Its totient is φ = 630558720.

The previous prime is 1261332607. The next prime is 1261332647. The reversal of 1261332634 is 4362331621.

It can be written as a sum of positive squares in 2 ways, for example, as 1260605025 + 727609 = 35505^2 + 853^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1261332596 and 1261332605.

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, 38247 + ... + 63130.

Almost surely, 2^1261332634 is an apocalyptic number.

1261332634 is a deficient number, since it is larger than the sum of its proper divisors (630989114).

1261332634 is a wasteful number, since it uses less digits than its factorization.

1261332634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107600.

The product of its digits is 15552, while the sum is 31.

The square root of 1261332634 is about 35515.2450927767. The cubic root of 1261332634 is about 1080.4629456756.

The spelling of 1261332634 in words is "one billion, two hundred sixty-one million, three hundred thirty-two thousand, six hundred thirty-four".