12531842 has 4 divisors (see below), whose sum is σ = 18797766. Its totient is φ = 6265920.

The previous prime is 12531833. The next prime is 12531851. The reversal of 12531842 is 24813521.

12531842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24813521 = 569 ⋅43609.

It is an interprime number because it is at equal distance from previous prime (12531833) and next prime (12531851).

It can be written as a sum of positive squares in only one way, i.e., 10426441 + 2105401 = 3229^2 + 1451^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3132959 + ... + 3132962.

Almost surely, 2^12531842 is an apocalyptic number.

12531842 is a deficient number, since it is larger than the sum of its proper divisors (6265924).

12531842 is an equidigital number, since it uses as much as digits as its factorization.

12531842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6265923.

The product of its digits is 1920, while the sum is 26.

The square root of 12531842 is about 3540.0341806259. The cubic root of 12531842 is about 232.2763378822.

It can be divided in two parts, 1253 and 1842, that multiplied together give a triangular number (2308026 = T₂₁₄₈).

The spelling of 12531842 in words is "twelve million, five hundred thirty-one thousand, eight hundred forty-two".