154158461 has 4 divisors (see below), whose sum is σ = 159474300. Its totient is φ = 148842624.

The previous prime is 154158409. The next prime is 154158463. The reversal of 154158461 is 164851451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41925625 + 112232836 = 6475^2 + 10594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154158461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154158463) 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 in 3 ways as a sum of consecutive naturals, for example, 2657876 + ... + 2657933.

It is an arithmetic number, because the mean of its divisors is an integer number (39868575).

Almost surely, 2^154158461 is an apocalyptic number.

It is an amenable number.

154158461 is a deficient number, since it is larger than the sum of its proper divisors (5315839).

154158461 is an equidigital number, since it uses as much as digits as its factorization.

154158461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5315838.

The product of its digits is 19200, while the sum is 35.

The square root of 154158461 is about 12416.0565800902. The cubic root of 154158461 is about 536.1946239929.

The spelling of 154158461 in words is "one hundred fifty-four million, one hundred fifty-eight thousand, four hundred sixty-one".