42311745 has 72 divisors (see below), whose sum is σ = 88208640. Its totient is φ = 18688320.

The previous prime is 42311723. The next prime is 42311747. The reversal of 42311745 is 54711324.

It is not a de Polignac number, because 42311745 - 2⁶ = 42311681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42311747) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 68046 + ... + 68664.

It is an arithmetic number, because the mean of its divisors is an integer number (1225120).

Almost surely, 2^42311745 is an apocalyptic number.

42311745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42311745 is an abundant number, since it is smaller than the sum of its proper divisors (45896895).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42311745 is a wasteful number, since it uses less digits than its factorization.

42311745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 665 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 42311745 is about 6504.7478813556. The cubic root of 42311745 is about 348.4605722957.

The spelling of 42311745 in words is "forty-two million, three hundred eleven thousand, seven hundred forty-five".