42261547 has 4 divisors (see below), whose sum is σ = 42286960. Its totient is φ = 42236136.

The previous prime is 42261539. The next prime is 42261551. The reversal of 42261547 is 74516224.

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 42261547 - 2³ = 42261539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42261577) 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, 10023 + ... + 13600.

It is an arithmetic number, because the mean of its divisors is an integer number (10571740).

Almost surely, 2^42261547 is an apocalyptic number.

42261547 is a deficient number, since it is larger than the sum of its proper divisors (25413).

42261547 is a wasteful number, since it uses less digits than its factorization.

42261547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25412.

The product of its digits is 13440, while the sum is 31.

The square root of 42261547 is about 6500.8881700888. Note that the first 3 decimals coincide. The cubic root of 42261547 is about 348.3227150191.

The spelling of 42261547 in words is "forty-two million, two hundred sixty-one thousand, five hundred forty-seven".