42232645 has 32 divisors (see below), whose sum is σ = 63060480. Its totient is φ = 26438400.

The previous prime is 42232643. The next prime is 42232657. The reversal of 42232645 is 54623224.

42232645 is a nontrivial binomial coefficient, being equal to C(9191, 2).

It is not a de Polignac number, because 42232645 - 2¹ = 42232643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42232643) 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 31 ways as a sum of consecutive naturals, for example, 45496 + ... + 46414.

It is an arithmetic number, because the mean of its divisors is an integer number (1970640).

Almost surely, 2^42232645 is an apocalyptic number.

42232645 is the 9190-th triangular number.

42232645 is the 3064-th centered nonagonal number.

It is an amenable number.

42232645 is a deficient number, since it is larger than the sum of its proper divisors (20827835).

42232645 is a wasteful number, since it uses less digits than its factorization.

42232645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045.

The product of its digits is 11520, while the sum is 28.

The square root of 42232645 is about 6498.6648628776. The cubic root of 42232645 is about 348.2432927891.

Adding to 42232645 its reverse (54623224), we get a palindrome (96855869).

The spelling of 42232645 in words is "forty-two million, two hundred thirty-two thousand, six hundred forty-five".