42561103 has 16 divisors (see below), whose sum is σ = 46996992. Its totient is φ = 38304000.

The previous prime is 42561091. The next prime is 42561131. The reversal of 42561103 is 30116524.

It is a cyclic number.

It is not a de Polignac number, because 42561103 - 2²⁵ = 9006671 is a prime.

It is a super-2 number, since 2×42561103² = 3622894977153218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42561143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151323 + ... + 151603.

It is an arithmetic number, because the mean of its divisors is an integer number (2937312).

Almost surely, 2^42561103 is an apocalyptic number.

42561103 is a deficient number, since it is larger than the sum of its proper divisors (4435889).

42561103 is a wasteful number, since it uses less digits than its factorization.

42561103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 42561103 is about 6523.8871081588. The cubic root of 42561103 is about 349.1437655331.

Adding to 42561103 its reverse (30116524), we get a palindrome (72677627).

The spelling of 42561103 in words is "forty-two million, five hundred sixty-one thousand, one hundred three".