1510391 has 2 divisors, whose sum is σ = 1510392. Its totient is φ = 1510390.

The previous prime is 1510373. The next prime is 1510393. The reversal of 1510391 is 1930151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1510391 - 2¹⁰ = 1509367 is a prime.

It is a Sophie Germain prime.

Together with 1510393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1510393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 755195 + 755196.

It is an arithmetic number, because the mean of its divisors is an integer number (755196).

2^1510391 is an apocalyptic number.

1510391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1510391 is an equidigital number, since it uses as much as digits as its factorization.

1510391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 1510391 is about 1228.9796580904. The cubic root of 1510391 is about 114.7351434702.

The spelling of 1510391 in words is "one million, five hundred ten thousand, three hundred ninety-one".