154881061 has 2 divisors, whose sum is σ = 154881062. Its totient is φ = 154881060.

The previous prime is 154881047. The next prime is 154881073. The reversal of 154881061 is 160188451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137030436 + 17850625 = 11706^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 154881061 - 2⁵ = 154881029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154884061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77440530 + 77440531.

It is an arithmetic number, because the mean of its divisors is an integer number (77440531).

Almost surely, 2^154881061 is an apocalyptic number.

It is an amenable number.

154881061 is a deficient number, since it is larger than the sum of its proper divisors (1).

154881061 is an equidigital number, since it uses as much as digits as its factorization.

154881061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 154881061 is about 12445.1219760997. The cubic root of 154881061 is about 537.0311018656.

The spelling of 154881061 in words is "one hundred fifty-four million, eight hundred eighty-one thousand, sixty-one".