9142391 has 2 divisors, whose sum is σ = 9142392. Its totient is φ = 9142390.

The previous prime is 9142373. The next prime is 9142411. The reversal of 9142391 is 1932419.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9142391 - 2⁶ = 9142327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9142321) 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, 4571195 + 4571196.

It is an arithmetic number, because the mean of its divisors is an integer number (4571196).

Almost surely, 2^9142391 is an apocalyptic number.

9142391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9142391 is an equidigital number, since it uses as much as digits as its factorization.

9142391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 9142391 is about 3023.6387019616. The cubic root of 9142391 is about 209.0996297044.

The spelling of 9142391 in words is "nine million, one hundred forty-two thousand, three hundred ninety-one".