144942681 has 16 divisors (see below), whose sum is σ = 209363840. Its totient is φ = 89191440.

The previous prime is 144942673. The next prime is 144942691. The reversal of 144942681 is 186249441.

It is not a de Polignac number, because 144942681 - 2³ = 144942673 is a prime.

It is a super-2 number, since 2×144942681² = 42016761550935522, which contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144942631) 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, 4405 + ... + 17586.

It is an arithmetic number, because the mean of its divisors is an integer number (13085240).

Almost surely, 2^144942681 is an apocalyptic number.

It is an amenable number.

144942681 is a deficient number, since it is larger than the sum of its proper divisors (64421159).

144942681 is an equidigital number, since it uses as much as digits as its factorization.

144942681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22033 (or 22007 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 144942681 is about 12039.2143016062. The cubic root of 144942681 is about 525.2895527455.

The spelling of 144942681 in words is "one hundred forty-four million, nine hundred forty-two thousand, six hundred eighty-one".