1291051 has 4 divisors (see below), whose sum is σ = 1335600. Its totient is φ = 1246504.

The previous prime is 1291021. The next prime is 1291063. The reversal of 1291051 is 1501921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1291051 - 2⁵ = 1291019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1291001) 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, 22231 + ... + 22288.

It is an arithmetic number, because the mean of its divisors is an integer number (333900).

2^1291051 is an apocalyptic number.

1291051 is a deficient number, since it is larger than the sum of its proper divisors (44549).

1291051 is an equidigital number, since it uses as much as digits as its factorization.

1291051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44548.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 1291051 is about 1136.2442519107. The cubic root of 1291051 is about 108.8882787616. Note that the first 3 decimals are identical.

Adding to 1291051 its reverse (1501921), we get a palindrome (2792972).

The spelling of 1291051 in words is "one million, two hundred ninety-one thousand, fifty-one".