42345045 has 32 divisors (see below), whose sum is σ = 79712640. Its totient is φ = 21254400.

The previous prime is 42345031. The next prime is 42345049. The reversal of 42345045 is 54054324.

It is not a de Polignac number, because 42345045 - 2⁴ = 42345029 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 (42345049) 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, 6931 + ... + 11520.

It is an arithmetic number, because the mean of its divisors is an integer number (2491020).

Almost surely, 2^42345045 is an apocalyptic number.

42345045 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42345045 is a deficient number, since it is larger than the sum of its proper divisors (37367595).

42345045 is a wasteful number, since it uses less digits than its factorization.

42345045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18482 (or 18476 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 42345045 is about 6507.3070466976. The cubic root of 42345045 is about 348.5519629507.

Adding to 42345045 its reverse (54054324), we get a palindrome (96399369).

The spelling of 42345045 in words is "forty-two million, three hundred forty-five thousand, forty-five".