1172040405 has 24 divisors (see below), whose sum is σ = 1937732256. Its totient is φ = 604916640.

The previous prime is 1172040383. The next prime is 1172040409. The reversal of 1172040405 is 5040402711.

It is not a de Polignac number, because 1172040405 - 2⁷ = 1172040277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172040409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26239 + ... + 55068.

It is an arithmetic number, because the mean of its divisors is an integer number (80738844).

Almost surely, 2^1172040405 is an apocalyptic number.

1172040405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1172040405 is a deficient number, since it is larger than the sum of its proper divisors (765691851).

1172040405 is an equidigital number, since it uses as much as digits as its factorization.

1172040405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81377 (or 81346 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 1172040405 is about 34235.0756534873. The cubic root of 1172040405 is about 1054.3404321310.

It can be divided in two parts, 11720 and 40405, that added together give a palindrome (52125).

The spelling of 1172040405 in words is "one billion, one hundred seventy-two million, forty thousand, four hundred five".