144164865 has 16 divisors (see below), whose sum is σ = 248407488. Its totient is φ = 70973376.

The previous prime is 144164863. The next prime is 144164869. The reversal of 144164865 is 568461441.

It is not a de Polignac number, because 144164865 - 2¹ = 144164863 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (144164863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369459 + ... + 369848.

It is an arithmetic number, because the mean of its divisors is an integer number (15525468).

Almost surely, 2^144164865 is an apocalyptic number.

144164865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144164865 is a deficient number, since it is larger than the sum of its proper divisors (104242623).

144164865 is a wasteful number, since it uses less digits than its factorization.

144164865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739328.

The product of its digits is 92160, while the sum is 39.

The square root of 144164865 is about 12006.8674099450. The cubic root of 144164865 is about 524.3482342786.

The spelling of 144164865 in words is "one hundred forty-four million, one hundred sixty-four thousand, eight hundred sixty-five".