150021405 has 12 divisors (see below), whose sum is σ = 260037180. Its totient is φ = 80011392.

The previous prime is 150021401. The next prime is 150021463. The reversal of 150021405 is 504120051.

It can be written as a sum of positive squares in 2 ways, for example, as 87721956 + 62299449 = 9366^2 + 7893^2 .

It is not a de Polignac number, because 150021405 - 2² = 150021401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150021401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1666860 + ... + 1666949.

It is an arithmetic number, because the mean of its divisors is an integer number (21669765).

Almost surely, 2^150021405 is an apocalyptic number.

150021405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

150021405 is a deficient number, since it is larger than the sum of its proper divisors (110015775).

150021405 is a wasteful number, since it uses less digits than its factorization.

150021405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333820 (or 3333817 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 150021405 is about 12248.3225382091. The cubic root of 150021405 is about 531.3545569522.

Adding to 150021405 its reverse (504120051), we get a palindrome (654141456).

It can be divided in two parts, 150021 and 405, that added together give a triangular number (150426 = T₅₄₈).

The spelling of 150021405 in words is "one hundred fifty million, twenty-one thousand, four hundred five".