3129842 has 4 divisors (see below), whose sum is σ = 4694766. Its totient is φ = 1564920.

The previous prime is 3129839. The next prime is 3129859. The reversal of 3129842 is 2489213.

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

It can be written as a sum of positive squares in only one way, i.e., 2374681 + 755161 = 1541^2 + 869^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782459 + ... + 782462.

Almost surely, 2^3129842 is an apocalyptic number.

3129842 is a deficient number, since it is larger than the sum of its proper divisors (1564924).

3129842 is a wasteful number, since it uses less digits than its factorization.

3129842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564923.

The product of its digits is 3456, while the sum is 29.

The square root of 3129842 is about 1769.1359472918. The cubic root of 3129842 is about 146.2763577789.

The spelling of 3129842 in words is "three million, one hundred twenty-nine thousand, eight hundred forty-two".