42124455 has 40 divisors (see below), whose sum is σ = 77153472. Its totient is φ = 21978432.

The previous prime is 42124451. The next prime is 42124457. The reversal of 42124455 is 55442124.

42124455 is a `hidden beast` number, since 4 + 212 + 445 + 5 = 666.

It is not a de Polignac number, because 42124455 - 2² = 42124451 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42124451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17929 + ... + 20141.

Almost surely, 2^42124455 is an apocalyptic number.

42124455 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42124455 is a deficient number, since it is larger than the sum of its proper divisors (35029017).

42124455 is a wasteful number, since it uses less digits than its factorization.

42124455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277 (or 2268 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 42124455 is about 6490.3355075065. The cubic root of 42124455 is about 347.9456663092.

Adding to 42124455 its reverse (55442124), we get a palindrome (97566579).

The spelling of 42124455 in words is "forty-two million, one hundred twenty-four thousand, four hundred fifty-five".