154005140 has 12 divisors (see below), whose sum is σ = 323410836. Its totient is φ = 61602048.

The previous prime is 154005139. The next prime is 154005149. The reversal of 154005140 is 41500451.

It can be written as a sum of positive squares in 2 ways, for example, as 60031504 + 93973636 = 7748^2 + 9694^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 7700257 = 154005140 / (1 + 5 + 4 + 0 + 0 + 5 + 1 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154005149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3850109 + ... + 3850148.

It is an arithmetic number, because the mean of its divisors is an integer number (26950903).

Almost surely, 2^154005140 is an apocalyptic number.

154005140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154005140 is an abundant number, since it is smaller than the sum of its proper divisors (169405696).

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

154005140 is a wasteful number, since it uses less digits than its factorization.

154005140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7700266 (or 7700264 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 154005140 is about 12409.8807407646. The cubic root of 154005140 is about 536.0168044408.

Adding to 154005140 its reverse (41500451), we get a palindrome (195505591).

The spelling of 154005140 in words is "one hundred fifty-four million, five thousand, one hundred forty".