42045534 has 32 divisors (see below), whose sum is σ = 96660000. Its totient is φ = 13531392.

The previous prime is 42045533. The next prime is 42045581. The reversal of 42045534 is 43554024.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 42045498 and 42045507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42045533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11859 + ... + 14990.

It is an arithmetic number, because the mean of its divisors is an integer number (3020625).

Almost surely, 2^42045534 is an apocalyptic number.

42045534 is an abundant number, since it is smaller than the sum of its proper divisors (54614466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42045534 is a wasteful number, since it uses less digits than its factorization.

42045534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26889 (or 26883 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 42045534 is about 6484.2527711372. The cubic root of 42045534 is about 347.7282361023.

Adding to 42045534 its reverse (43554024), we get a palindrome (85599558).

It can be divided in two parts, 420 and 45534, that added together give a palindrome (45954).

The spelling of 42045534 in words is "forty-two million, forty-five thousand, five hundred thirty-four".