154809642 has 32 divisors (see below), whose sum is σ = 347937408. Its totient is φ = 45562176.

The previous prime is 154809637. The next prime is 154809647. The reversal of 154809642 is 246908451.

It is an interprime number because it is at equal distance from previous prime (154809637) and next prime (154809647).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 154809642.

It is not an unprimeable number, because it can be changed into a prime (154809647) 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 15 ways as a sum of consecutive naturals, for example, 41353 + ... + 44940.

It is an arithmetic number, because the mean of its divisors is an integer number (10873044).

Almost surely, 2^154809642 is an apocalyptic number.

154809642 is an abundant number, since it is smaller than the sum of its proper divisors (193127766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154809642 is a wasteful number, since it uses less digits than its factorization.

154809642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86334.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 154809642 is about 12442.2522880707. The cubic root of 154809642 is about 536.9485436306.

The spelling of 154809642 in words is "one hundred fifty-four million, eight hundred nine thousand, six hundred forty-two".