7842387 has 8 divisors (see below), whose sum is σ = 11950336. Its totient is φ = 4481352.

The previous prime is 7842371. The next prime is 7842403. The reversal of 7842387 is 7832487.

It is an interprime number because it is at equal distance from previous prime (7842371) and next prime (7842403).

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

It is not a de Polignac number, because 7842387 - 2⁴ = 7842371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7842337) 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, 186703 + ... + 186744.

It is an arithmetic number, because the mean of its divisors is an integer number (1493792).

Almost surely, 2^7842387 is an apocalyptic number.

7842387 is a deficient number, since it is larger than the sum of its proper divisors (4107949).

7842387 is a wasteful number, since it uses less digits than its factorization.

7842387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373457.

The product of its digits is 75264, while the sum is 39.

The square root of 7842387 is about 2800.4262175605. The cubic root of 7842387 is about 198.6778370194.

The spelling of 7842387 in words is "seven million, eight hundred forty-two thousand, three hundred eighty-seven".