1513891 has 2 divisors, whose sum is σ = 1513892. Its totient is φ = 1513890.

The previous prime is 1513871. The next prime is 1513909. The reversal of 1513891 is 1983151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1513891 - 2⁵ = 1513859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1513871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756945 + 756946.

It is an arithmetic number, because the mean of its divisors is an integer number (756946).

2^1513891 is an apocalyptic number.

1513891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513891 is an equidigital number, since it uses as much as digits as its factorization.

1513891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 28.

The square root of 1513891 is about 1230.4027795807. The cubic root of 1513891 is about 114.8236996156.

The spelling of 1513891 in words is "one million, five hundred thirteen thousand, eight hundred ninety-one".