144121616 has 20 divisors (see below), whose sum is σ = 282375900. Its totient is φ = 71250432.

The previous prime is 144121613. The next prime is 144121639. The reversal of 144121616 is 616121441.

It can be written as a sum of positive squares in 2 ways, for example, as 29203216 + 114918400 = 5404^2 + 10720^2 .

It is a super-4 number, since 4×144121616⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (144121613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49181 + ... + 52028.

It is an arithmetic number, because the mean of its divisors is an integer number (14118795).

Almost surely, 2^144121616 is an apocalyptic number.

144121616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

144121616 is a deficient number, since it is larger than the sum of its proper divisors (138254284).

144121616 is a wasteful number, since it uses less digits than its factorization.

144121616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101306 (or 101300 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 144121616 is about 12005.0662638738. The cubic root of 144121616 is about 524.2957947680.

The spelling of 144121616 in words is "one hundred forty-four million, one hundred twenty-one thousand, six hundred sixteen".