42151399 has 4 divisors (see below), whose sum is σ = 43290664. Its totient is φ = 41012136.

The previous prime is 42151391. The next prime is 42151409. The reversal of 42151399 is 99315124.

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

It is a cyclic number.

It is not a de Polignac number, because 42151399 - 2³ = 42151391 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 (42151391) 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, 569577 + ... + 569650.

It is an arithmetic number, because the mean of its divisors is an integer number (10822666).

Almost surely, 2^42151399 is an apocalyptic number.

42151399 is a deficient number, since it is larger than the sum of its proper divisors (1139265).

42151399 is a wasteful number, since it uses less digits than its factorization.

42151399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139264.

The product of its digits is 9720, while the sum is 34.

The square root of 42151399 is about 6492.4108773244. The cubic root of 42151399 is about 348.0198358139.

The spelling of 42151399 in words is "forty-two million, one hundred fifty-one thousand, three hundred ninety-nine".