131000405 has 8 divisors (see below), whose sum is σ = 157946784. Its totient is φ = 104302800.

The previous prime is 131000399. The next prime is 131000423. The reversal of 131000405 is 504000131.

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

It is not a de Polignac number, because 131000405 - 2¹⁰ = 130999381 is a prime.

It is a super-2 number, since 2×131000405² = 34322212220328050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131000405.

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, 61031 + ... + 63140.

It is an arithmetic number, because the mean of its divisors is an integer number (19743348).

Almost surely, 2^131000405 is an apocalyptic number.

It is an amenable number.

131000405 is a deficient number, since it is larger than the sum of its proper divisors (26946379).

131000405 is a wasteful number, since it uses less digits than its factorization.

131000405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124387.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 131000405 is about 11445.5408347531. The cubic root of 131000405 is about 507.8758311957.

Adding to 131000405 its reverse (504000131), we get a palindrome (635000536).

The spelling of 131000405 in words is "one hundred thirty-one million, four hundred five", and thus it is an aban number.