42347187 has 12 divisors (see below), whose sum is σ = 64766520. Its totient is φ = 26570688.

The previous prime is 42347177. The next prime is 42347189. The reversal of 42347187 is 78174324.

It is a happy number.

It is not a de Polignac number, because 42347187 - 2⁷ = 42347059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42347189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138237 + ... + 138542.

It is an arithmetic number, because the mean of its divisors is an integer number (5397210).

Almost surely, 2^42347187 is an apocalyptic number.

42347187 is a deficient number, since it is larger than the sum of its proper divisors (22419333).

42347187 is a wasteful number, since it uses less digits than its factorization.

42347187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276802 (or 276799 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 42347187 is about 6507.4716288279. The cubic root of 42347187 is about 348.5578399525.

The spelling of 42347187 in words is "forty-two million, three hundred forty-seven thousand, one hundred eighty-seven".