144720945 has 64 divisors (see below), whose sum is σ = 271319040. Its totient is φ = 73047744.

The previous prime is 144720937. The next prime is 144720971. The reversal of 144720945 is 549027441.

It is a happy number.

144720945 is a `hidden beast` number, since 1 + 447 + 209 + 4 + 5 = 666.

It is not a de Polignac number, because 144720945 - 2³ = 144720937 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 394152 + ... + 394518.

It is an arithmetic number, because the mean of its divisors is an integer number (4239360).

Almost surely, 2^144720945 is an apocalyptic number.

144720945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144720945 is a deficient number, since it is larger than the sum of its proper divisors (126598095).

144720945 is a wasteful number, since it uses less digits than its factorization.

144720945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 144720945 is about 12030.0018703240. The cubic root of 144720945 is about 525.0215501358.

The spelling of 144720945 in words is "one hundred forty-four million, seven hundred twenty thousand, nine hundred forty-five".