155142877 has 2 divisors, whose sum is σ = 155142878. Its totient is φ = 155142876.

The previous prime is 155142863. The next prime is 155142899. The reversal of 155142877 is 778241551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152300281 + 2842596 = 12341^2 + 1686^2 .

It is an emirp because it is prime and its reverse (778241551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155142877 - 2⁷ = 155142749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155142577) 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, 77571438 + 77571439.

It is an arithmetic number, because the mean of its divisors is an integer number (77571439).

Almost surely, 2^155142877 is an apocalyptic number.

It is an amenable number.

155142877 is a deficient number, since it is larger than the sum of its proper divisors (1).

155142877 is an equidigital number, since it uses as much as digits as its factorization.

155142877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78400, while the sum is 40.

The square root of 155142877 is about 12455.6363546790. The cubic root of 155142877 is about 537.3335364812. Note that the first 3 decimals are identical.

The spelling of 155142877 in words is "one hundred fifty-five million, one hundred forty-two thousand, eight hundred seventy-seven".