131122405 has 8 divisors (see below), whose sum is σ = 162422784. Its totient is φ = 101514000.

The previous prime is 131122393. The next prime is 131122421. The reversal of 131122405 is 504221131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131122405 - 2¹³ = 131114213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422821 + ... + 423130.

It is an arithmetic number, because the mean of its divisors is an integer number (20302848).

Almost surely, 2^131122405 is an apocalyptic number.

It is an amenable number.

131122405 is a deficient number, since it is larger than the sum of its proper divisors (31300379).

131122405 is an equidigital number, since it uses as much as digits as its factorization.

131122405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845987.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 131122405 is about 11450.8691809836. The cubic root of 131122405 is about 508.0334429902.

Adding to 131122405 its reverse (504221131), we get a palindrome (635343536).

It can be divided in two parts, 1311 and 22405, that added together give a square (23716 = 154²).

The spelling of 131122405 in words is "one hundred thirty-one million, one hundred twenty-two thousand, four hundred five".