154742591 has 2 divisors, whose sum is σ = 154742592. Its totient is φ = 154742590.

The previous prime is 154742587. The next prime is 154742603. The reversal of 154742591 is 195247451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 154742591 - 2² = 154742587 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154742531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77371295 + 77371296.

It is an arithmetic number, because the mean of its divisors is an integer number (77371296).

Almost surely, 2^154742591 is an apocalyptic number.

154742591 is a deficient number, since it is larger than the sum of its proper divisors (1).

154742591 is an equidigital number, since it uses as much as digits as its factorization.

154742591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 154742591 is about 12439.5575082074. The cubic root of 154742591 is about 536.8710115608.

The spelling of 154742591 in words is "one hundred fifty-four million, seven hundred forty-two thousand, five hundred ninety-one".