7842142 has 16 divisors (see below), whose sum is σ = 14666112. Its totient is φ = 3055320.

The previous prime is 7842139. The next prime is 7842143. The reversal of 7842142 is 2412487.

It is a super-2 number, since 2×7842142² = 122998382296328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7842142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7842143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25308 + ... + 25615.

It is an arithmetic number, because the mean of its divisors is an integer number (916632).

Almost surely, 2^7842142 is an apocalyptic number.

7842142 is a deficient number, since it is larger than the sum of its proper divisors (6823970).

7842142 is a wasteful number, since it uses less digits than its factorization.

7842142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50943.

The product of its digits is 3584, while the sum is 28.

The square root of 7842142 is about 2800.3824738775. The cubic root of 7842142 is about 198.6757680669.

It can be divided in two parts, 784 and 2142, that added together give a triangular number (2926 = T₇₆).

The spelling of 7842142 in words is "seven million, eight hundred forty-two thousand, one hundred forty-two".