144521887 has 2 divisors, whose sum is σ = 144521888. Its totient is φ = 144521886.

The previous prime is 144521863. The next prime is 144521891. The reversal of 144521887 is 788125441.

It is a strong prime.

It is an emirp because it is prime and its reverse (788125441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144521887 is a prime.

It is a super-3 number, since 3×144521887³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144521827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72260943 + 72260944.

It is an arithmetic number, because the mean of its divisors is an integer number (72260944).

Almost surely, 2^144521887 is an apocalyptic number.

144521887 is a deficient number, since it is larger than the sum of its proper divisors (1).

144521887 is an equidigital number, since it uses as much as digits as its factorization.

144521887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 40.

The square root of 144521887 is about 12021.7256248843. The cubic root of 144521887 is about 524.7807241500.

It can be divided in two parts, 1445 and 21887, that added together give a palindrome (23332).

The spelling of 144521887 in words is "one hundred forty-four million, five hundred twenty-one thousand, eight hundred eighty-seven".