1291862055 has 16 divisors (see below), whose sum is σ = 2254886784. Its totient is φ = 626357280.

The previous prime is 1291862027. The next prime is 1291862081. The reversal of 1291862055 is 5502681921.

It is not a de Polignac number, because 1291862055 - 2⁵ = 1291862023 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3914569 + ... + 3914898.

It is an arithmetic number, because the mean of its divisors is an integer number (140930424).

Almost surely, 2^1291862055 is an apocalyptic number.

1291862055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1291862055 is a deficient number, since it is larger than the sum of its proper divisors (963024729).

1291862055 is a wasteful number, since it uses less digits than its factorization.

1291862055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7829486.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 1291862055 is about 35942.4825937219. The cubic root of 1291862055 is about 1089.1107566531.

The spelling of 1291862055 in words is "one billion, two hundred ninety-one million, eight hundred sixty-two thousand, fifty-five".