131002405 has 8 divisors (see below), whose sum is σ = 158441472. Its totient is φ = 103976208.

The previous prime is 131002349. The next prime is 131002423. The reversal of 131002405 is 504200131.

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

It is a cyclic number.

It is not a de Polignac number, because 131002405 - 2¹¹ = 131000357 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, 102517 + ... + 103786.

It is an arithmetic number, because the mean of its divisors is an integer number (19805184).

Almost surely, 2^131002405 is an apocalyptic number.

It is an amenable number.

131002405 is a deficient number, since it is larger than the sum of its proper divisors (27439067).

131002405 is a wasteful number, since it uses less digits than its factorization.

131002405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206435.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 131002405 is about 11445.6282046902. The cubic root of 131002405 is about 507.8784157844.

Adding to 131002405 its reverse (504200131), we get a palindrome (635202536).

The spelling of 131002405 in words is "one hundred thirty-one million, two thousand, four hundred five".