142227391 has 2 divisors, whose sum is σ = 142227392. Its totient is φ = 142227390.

The previous prime is 142227383. The next prime is 142227403. The reversal of 142227391 is 193722241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142227391 - 2³ = 142227383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142227191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71113695 + 71113696.

It is an arithmetic number, because the mean of its divisors is an integer number (71113696).

Almost surely, 2^142227391 is an apocalyptic number.

142227391 is a deficient number, since it is larger than the sum of its proper divisors (1).

142227391 is an equidigital number, since it uses as much as digits as its factorization.

142227391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 142227391 is about 11925.9125856263. The cubic root of 142227391 is about 521.9886755420.

The spelling of 142227391 in words is "one hundred forty-two million, two hundred twenty-seven thousand, three hundred ninety-one".