1291895 has 16 divisors (see below), whose sum is σ = 1717632. Its totient is φ = 924960.

The previous prime is 1291883. The next prime is 1291907. The reversal of 1291895 is 5981921.

It is an interprime number because it is at equal distance from previous prime (1291883) and next prime (1291907).

It is not a de Polignac number, because 1291895 - 2⁶ = 1291831 is a prime.

It is a Duffinian number.

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, 4424 + ... + 4706.

It is an arithmetic number, because the mean of its divisors is an integer number (107352).

2^1291895 is an apocalyptic number.

1291895 is a deficient number, since it is larger than the sum of its proper divisors (425737).

1291895 is a wasteful number, since it uses less digits than its factorization.

1291895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382.

The product of its digits is 6480, while the sum is 35.

The square root of 1291895 is about 1136.6155902503. The cubic root of 1291895 is about 108.9120014723.

The spelling of 1291895 in words is "one million, two hundred ninety-one thousand, eight hundred ninety-five".