144721725 has 24 divisors (see below), whose sum is σ = 239627520. Its totient is φ = 77070720.

The previous prime is 144721721. The next prime is 144721729. The reversal of 144721725 is 527127441.

It is an interprime number because it is at equal distance from previous prime (144721721) and next prime (144721729).

It is not a de Polignac number, because 144721725 - 2² = 144721721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144721721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81396 + ... + 83154.

It is an arithmetic number, because the mean of its divisors is an integer number (9984480).

Almost surely, 2^144721725 is an apocalyptic number.

144721725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144721725 is a deficient number, since it is larger than the sum of its proper divisors (94905795).

144721725 is a wasteful number, since it uses less digits than its factorization.

144721725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869 (or 2864 counting only the distinct ones).

The product of its digits is 15680, while the sum is 33.

The square root of 144721725 is about 12030.0342892279. The cubic root of 144721725 is about 525.0224933673.

The spelling of 144721725 in words is "one hundred forty-four million, seven hundred twenty-one thousand, seven hundred twenty-five".