42645237 has 8 divisors (see below), whose sum is σ = 56892000. Its totient is φ = 28414320.

The previous prime is 42645221. The next prime is 42645241. The reversal of 42645237 is 73254624.

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

It is not a de Polignac number, because 42645237 - 2⁴ = 42645221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42645198 and 42645207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42645217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5662 + ... + 10832.

It is an arithmetic number, because the mean of its divisors is an integer number (7111500).

Almost surely, 2^42645237 is an apocalyptic number.

It is an amenable number.

42645237 is a deficient number, since it is larger than the sum of its proper divisors (14246763).

42645237 is a wasteful number, since it uses less digits than its factorization.

42645237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7923.

The product of its digits is 40320, while the sum is 33.

The square root of 42645237 is about 6530.3320742517. The cubic root of 42645237 is about 349.3736744157.

The spelling of 42645237 in words is "forty-two million, six hundred forty-five thousand, two hundred thirty-seven".