144706861 has 8 divisors (see below), whose sum is σ = 156099384. Its totient is φ = 133351680.

The previous prime is 144706829. The next prime is 144706867. The reversal of 144706861 is 168607441.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22184100 + 122522761 = 4710^2 + 11069^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144706861 - 2⁵ = 144706829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144706861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144706867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000 + ... + 17041.

It is an arithmetic number, because the mean of its divisors is an integer number (19512423).

Almost surely, 2^144706861 is an apocalyptic number.

It is an amenable number.

144706861 is a deficient number, since it is larger than the sum of its proper divisors (11392523).

144706861 is a wasteful number, since it uses less digits than its factorization.

144706861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18671.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 144706861 is about 12029.4164862640. The cubic root of 144706861 is about 525.0045181773.

The spelling of 144706861 in words is "one hundred forty-four million, seven hundred six thousand, eight hundred sixty-one".