1291061434 has 8 divisors (see below), whose sum is σ = 2085560820. Its totient is φ = 595874496.

The previous prime is 1291061417. The next prime is 1291061441. The reversal of 1291061434 is 4341601921.

It can be written as a sum of positive squares in 2 ways, for example, as 942305809 + 348755625 = 30697^2 + 18675^2 .

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 = 1291061396 and 1291061405.

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, 24828079 + ... + 24828130.

Almost surely, 2^1291061434 is an apocalyptic number.

1291061434 is a deficient number, since it is larger than the sum of its proper divisors (794499386).

1291061434 is a wasteful number, since it uses less digits than its factorization.

1291061434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49656224.

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

The square root of 1291061434 is about 35931.3433369809. The cubic root of 1291061434 is about 1088.8857209813.

The spelling of 1291061434 in words is "one billion, two hundred ninety-one million, sixty-one thousand, four hundred thirty-four".