1239480405 has 12 divisors (see below), whose sum is σ = 2148432780. Its totient is φ = 661056192.

The previous prime is 1239480401. The next prime is 1239480433. The reversal of 1239480405 is 5040849321.

It can be written as a sum of positive squares in 2 ways, for example, as 413837649 + 825642756 = 20343^2 + 28734^2 .

It is not a de Polignac number, because 1239480405 - 2² = 1239480401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1239480405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239480401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13771960 + ... + 13772049.

It is an arithmetic number, because the mean of its divisors is an integer number (179036065).

Almost surely, 2^1239480405 is an apocalyptic number.

1239480405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1239480405 is a deficient number, since it is larger than the sum of its proper divisors (908952375).

1239480405 is a wasteful number, since it uses less digits than its factorization.

1239480405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27544020 (or 27544017 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1239480405 is about 35206.2551970527. The cubic root of 1239480405 is about 1074.1869908388.

The spelling of 1239480405 in words is "one billion, two hundred thirty-nine million, four hundred eighty thousand, four hundred five".