42442515 has 64 divisors (see below), whose sum is σ = 80438400. Its totient is φ = 21192192.

The previous prime is 42442483. The next prime is 42442541. The reversal of 42442515 is 51524424.

It is not a de Polignac number, because 42442515 - 2⁵ = 42442483 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 an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 144709 + ... + 145001.

It is an arithmetic number, because the mean of its divisors is an integer number (1256850).

Almost surely, 2^42442515 is an apocalyptic number.

42442515 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42442515 is a deficient number, since it is larger than the sum of its proper divisors (37995885).

42442515 is a wasteful number, since it uses less digits than its factorization.

42442515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 367 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 42442515 is about 6514.7920150992. The cubic root of 42442515 is about 348.8191908042.

Adding to 42442515 its reverse (51524424), we get a palindrome (93966939).

The spelling of 42442515 in words is "forty-two million, four hundred forty-two thousand, five hundred fifteen".