42145450 has 24 divisors (see below), whose sum is σ = 78670188. Its totient is φ = 16798080.

The previous prime is 42145429. The next prime is 42145457. The reversal of 42145450 is 5454124.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2493241 + 39652209 = 1579^2 + 6297^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (42145457) 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 11 ways as a sum of consecutive naturals, for example, 14304 + ... + 16996.

Almost surely, 2^42145450 is an apocalyptic number.

42145450 is a deficient number, since it is larger than the sum of its proper divisors (36524738).

42145450 is a wasteful number, since it uses less digits than its factorization.

42145450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018 (or 3013 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 42145450 is about 6491.9527108567. The cubic root of 42145450 is about 348.0034625542.

Adding to 42145450 its reverse (5454124), we get a palindrome (47599574).

The spelling of 42145450 in words is "forty-two million, one hundred forty-five thousand, four hundred fifty".