1351691 has 6 divisors (see below), whose sum is σ = 1485876. Its totient is φ = 1228700.

The previous prime is 1351667. The next prime is 1351697. The reversal of 1351691 is 1961531.

It is a de Polignac number, because none of the positive numbers 2^k-1351691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1351691.

It is not an unprimeable number, because it can be changed into a prime (1351697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5465 + ... + 5706.

It is an arithmetic number, because the mean of its divisors is an integer number (247646).

2^1351691 is an apocalyptic number.

1351691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1351691 is a deficient number, since it is larger than the sum of its proper divisors (134185).

1351691 is a wasteful number, since it uses less digits than its factorization.

1351691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11193 (or 11182 counting only the distinct ones).

The product of its digits is 810, while the sum is 26.

The square root of 1351691 is about 1162.6224666675. The cubic root of 1351691 is about 110.5670716109.

The spelling of 1351691 in words is "one million, three hundred fifty-one thousand, six hundred ninety-one".