7871242 has 8 divisors (see below), whose sum is σ = 12029796. Its totient is φ = 3861312.

The previous prime is 7871219. The next prime is 7871243. The reversal of 7871242 is 2421787.

It can be written as a sum of positive squares in 2 ways, for example, as 7447441 + 423801 = 2729^2 + 651^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7871243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37023 + ... + 37234.

Almost surely, 2^7871242 is an apocalyptic number.

7871242 is a deficient number, since it is larger than the sum of its proper divisors (4158554).

7871242 is a wasteful number, since it uses less digits than its factorization.

7871242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74312.

The product of its digits is 6272, while the sum is 31.

The square root of 7871242 is about 2805.5733816815. The cubic root of 7871242 is about 198.9212081700.

The spelling of 7871242 in words is "seven million, eight hundred seventy-one thousand, two hundred forty-two".