42178149 has 12 divisors (see below), whose sum is σ = 65610636. Its totient is φ = 25955712.

The previous prime is 42178127. The next prime is 42178153. The reversal of 42178149 is 94187124.

It can be written as a sum of positive squares in 2 ways, for example, as 9345249 + 32832900 = 3057^2 + 5730^2 .

It is not a de Polignac number, because 42178149 - 2⁵ = 42178117 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42178109) 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, 180132 + ... + 180365.

It is an arithmetic number, because the mean of its divisors is an integer number (5467553).

Almost surely, 2^42178149 is an apocalyptic number.

It is an amenable number.

42178149 is a deficient number, since it is larger than the sum of its proper divisors (23432487).

42178149 is a wasteful number, since it uses less digits than its factorization.

42178149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360516 (or 360513 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 42178149 is about 6494.4706481745. The cubic root of 42178149 is about 348.0934400294.

The spelling of 42178149 in words is "forty-two million, one hundred seventy-eight thousand, one hundred forty-nine".