1291880461 has 8 divisors (see below), whose sum is σ = 1321846560. Its totient is φ = 1262183472.

The previous prime is 1291880431. The next prime is 1291880467. The reversal of 1291880461 is 1640881921.

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

It is a cyclic number.

It is not a de Polignac number, because 1291880461 - 2²⁵ = 1258326029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291880467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57550 + ... + 76783.

It is an arithmetic number, because the mean of its divisors is an integer number (165230820).

Almost surely, 2^1291880461 is an apocalyptic number.

It is an amenable number.

1291880461 is a deficient number, since it is larger than the sum of its proper divisors (29966099).

1291880461 is a wasteful number, since it uses less digits than its factorization.

1291880461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134555.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 1291880461 is about 35942.7386407881. The cubic root of 1291880461 is about 1089.1159290519.

The spelling of 1291880461 in words is "one billion, two hundred ninety-one million, eight hundred eighty thousand, four hundred sixty-one".