42320745 has 32 divisors (see below), whose sum is σ = 75623040. Its totient is φ = 22455360.

The previous prime is 42320737. The next prime is 42320749. The reversal of 42320745 is 54702324.

It is not a de Polignac number, because 42320745 - 2³ = 42320737 is a prime.

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 (42320749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29955 + ... + 31335.

It is an arithmetic number, because the mean of its divisors is an integer number (2363220).

Almost surely, 2^42320745 is an apocalyptic number.

42320745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42320745 is a deficient number, since it is larger than the sum of its proper divisors (33302295).

42320745 is a wasteful number, since it uses less digits than its factorization.

42320745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 42320745 is about 6505.4396469416. The cubic root of 42320745 is about 348.4852771998.

The spelling of 42320745 in words is "forty-two million, three hundred twenty thousand, seven hundred forty-five".