144961187 has 4 divisors (see below), whose sum is σ = 165669936. Its totient is φ = 124252440.

The previous prime is 144961163. The next prime is 144961211. The reversal of 144961187 is 781169441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781169441 = 13 ⋅60089957.

It is an interprime number because it is at equal distance from previous prime (144961163) and next prime (144961211).

It is a cyclic number.

It is not a de Polignac number, because 144961187 - 2⁶ = 144961123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144960187) 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, 10354364 + ... + 10354377.

It is an arithmetic number, because the mean of its divisors is an integer number (41417484).

Almost surely, 2^144961187 is an apocalyptic number.

144961187 is a deficient number, since it is larger than the sum of its proper divisors (20708749).

144961187 is an equidigital number, since it uses as much as digits as its factorization.

144961187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20708748.

The product of its digits is 48384, while the sum is 41.

The square root of 144961187 is about 12039.9828488250. The cubic root of 144961187 is about 525.3119077774.

The spelling of 144961187 in words is "one hundred forty-four million, nine hundred sixty-one thousand, one hundred eighty-seven".