144978581 has 8 divisors (see below), whose sum is σ = 158246400. Its totient is φ = 131725440.

The previous prime is 144978571. The next prime is 144978593. The reversal of 144978581 is 185879441.

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

It is not a de Polignac number, because 144978581 - 2²⁶ = 77869717 is a prime.

It is a super-2 number, since 2×144978581² = 42037577897547122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144978541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32780 + ... + 36938.

It is an arithmetic number, because the mean of its divisors is an integer number (19780800).

Almost surely, 2^144978581 is an apocalyptic number.

144978581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144978581 is a deficient number, since it is larger than the sum of its proper divisors (13267819).

144978581 is a wasteful number, since it uses less digits than its factorization.

144978581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7339.

The product of its digits is 322560, while the sum is 47.

The square root of 144978581 is about 12040.7051703793. The cubic root of 144978581 is about 525.3329177919.

The spelling of 144978581 in words is "one hundred forty-four million, nine hundred seventy-eight thousand, five hundred eighty-one".