42400534 has 8 divisors (see below), whose sum is σ = 69382728. Its totient is φ = 19272960.

The previous prime is 42400531. The next prime is 42400549. The reversal of 42400534 is 43500424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 1927297 = 42400534 / (4 + 2 + 4 + 0 + 0 + 5 + 3 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42400531) 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, 963627 + ... + 963670.

It is an arithmetic number, because the mean of its divisors is an integer number (8672841).

Almost surely, 2^42400534 is an apocalyptic number.

42400534 is a deficient number, since it is larger than the sum of its proper divisors (26982194).

42400534 is a wasteful number, since it uses less digits than its factorization.

42400534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927310.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 42400534 is about 6511.5692425098. The cubic root of 42400534 is about 348.7041441402.

Adding to 42400534 its reverse (43500424), we get a palindrome (85900958).

The spelling of 42400534 in words is "forty-two million, four hundred thousand, five hundred thirty-four".