151391 has 2 divisors, whose sum is σ = 151392. Its totient is φ = 151390.

The previous prime is 151381. The next prime is 151397. The reversal of 151391 is 193151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 151391 - 2¹⁴ = 135007 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 151391.

It is not a weakly prime, because it can be changed into another prime (151397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75695 + 75696.

It is an arithmetic number, because the mean of its divisors is an integer number (75696).

2¹⁵¹³⁹¹ is an apocalyptic number.

151391 is a deficient number, since it is larger than the sum of its proper divisors (1).

151391 is an equidigital number, since it uses as much as digits as its factorization.

151391 is an evil number, because the sum of its binary digits is even.

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

The square root of 151391 is about 389.0899638901. The cubic root of 151391 is about 53.2966631607.

The spelling of 151391 in words is "one hundred fifty-one thousand, three hundred ninety-one".