131012345 has 4 divisors (see below), whose sum is σ = 157214820. Its totient is φ = 104809872.

The previous prime is 131012333. The next prime is 131012351. The reversal of 131012345 is 543210131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92236816 + 38775529 = 9604^2 + 6227^2 .

It is a cyclic number.

It is not a de Polignac number, because 131012345 - 2¹⁴ = 130995961 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13101230 + ... + 13101239.

It is an arithmetic number, because the mean of its divisors is an integer number (39303705).

Almost surely, 2^131012345 is an apocalyptic number.

It is an amenable number.

131012345 is a deficient number, since it is larger than the sum of its proper divisors (26202475).

131012345 is an equidigital number, since it uses as much as digits as its factorization.

131012345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26202474.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 131012345 is about 11446.0624233839. The cubic root of 131012345 is about 507.8912607999.

Adding to 131012345 its reverse (543210131), we get a palindrome (674222476).

The spelling of 131012345 in words is "one hundred thirty-one million, twelve thousand, three hundred forty-five".