42100545 has 16 divisors (see below), whose sum is σ = 67560192. Its totient is φ = 22387200.

The previous prime is 42100543. The next prime is 42100549. The reversal of 42100545 is 54500124.

It is not a de Polignac number, because 42100545 - 2¹ = 42100543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42100543) 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, 1320 + ... + 9270.

It is an arithmetic number, because the mean of its divisors is an integer number (4222512).

Almost surely, 2^42100545 is an apocalyptic number.

It is an amenable number.

42100545 is a deficient number, since it is larger than the sum of its proper divisors (25459647).

42100545 is a wasteful number, since it uses less digits than its factorization.

42100545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8312.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 42100545 is about 6488.4932765627. The cubic root of 42100545 is about 347.8798220910.

Adding to 42100545 its reverse (54500124), we get a palindrome (96600669).

The spelling of 42100545 in words is "forty-two million, one hundred thousand, five hundred forty-five".