42147549 has 12 divisors (see below), whose sum is σ = 62365212. Its totient is φ = 27412800.

The previous prime is 42147541. The next prime is 42147557. The reversal of 42147549 is 94574124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42147541) and next prime (42147557).

It can be written as a sum of positive squares in 2 ways, for example, as 10304100 + 31843449 = 3210^2 + 5643^2 .

It is not a de Polignac number, because 42147549 - 2³ = 42147541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42147541) 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, 56742 + ... + 57479.

It is an arithmetic number, because the mean of its divisors is an integer number (5197101).

Almost surely, 2^42147549 is an apocalyptic number.

It is an amenable number.

42147549 is a deficient number, since it is larger than the sum of its proper divisors (20217663).

42147549 is a wasteful number, since it uses less digits than its factorization.

42147549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114268 (or 114265 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 42147549 is about 6492.1143705268. The cubic root of 42147549 is about 348.0092397467.

The spelling of 42147549 in words is "forty-two million, one hundred forty-seven thousand, five hundred forty-nine".