1291868041 has 4 divisors (see below), whose sum is σ = 1292256000. Its totient is φ = 1291480084.

The previous prime is 1291868027. The next prime is 1291868051. The reversal of 1291868041 is 1408681921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1291868041 - 2⁵ = 1291868009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1291867985 and 1291868003.

It is not an unprimeable number, because it can be changed into a prime (1291868051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188941 + ... + 195658.

It is an arithmetic number, because the mean of its divisors is an integer number (323064000).

Almost surely, 2^1291868041 is an apocalyptic number.

It is an amenable number.

1291868041 is a deficient number, since it is larger than the sum of its proper divisors (387959).

1291868041 is an equidigital number, since it uses as much as digits as its factorization.

1291868041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387958.

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

The square root of 1291868041 is about 35942.5658655583. The cubic root of 1291868041 is about 1089.1124388262.

The spelling of 1291868041 in words is "one billion, two hundred ninety-one million, eight hundred sixty-eight thousand, forty-one".