42515445 has 64 divisors (see below), whose sum is σ = 83036160. Its totient is φ = 18144000.

The previous prime is 42515441. The next prime is 42515449. The reversal of 42515445 is 54451524.

It is an interprime number because it is at equal distance from previous prime (42515441) and next prime (42515449).

It is not a de Polignac number, because 42515445 - 2² = 42515441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42515441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 201390 + ... + 201600.

It is an arithmetic number, because the mean of its divisors is an integer number (1297440).

Almost surely, 2^42515445 is an apocalyptic number.

It is an amenable number.

42515445 is a deficient number, since it is larger than the sum of its proper divisors (40520715).

42515445 is a wasteful number, since it uses less digits than its factorization.

42515445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its digits is 16000, while the sum is 30.

The square root of 42515445 is about 6520.3868750251. The cubic root of 42515445 is about 349.0188712931.

Adding to 42515445 its reverse (54451524), we get a palindrome (96966969).

The spelling of 42515445 in words is "forty-two million, five hundred fifteen thousand, four hundred forty-five".