2113545 has 16 divisors (see below), whose sum is σ = 3864960. Its totient is φ = 966144.

The previous prime is 2113523. The next prime is 2113567. The reversal of 2113545 is 5453112.

It is an interprime number because it is at equal distance from previous prime (2113523) and next prime (2113567).

It is not a de Polignac number, because 2113545 - 2⁵ = 2113513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9960 + ... + 10169.

It is an arithmetic number, because the mean of its divisors is an integer number (241560).

2^2113545 is an apocalyptic number.

It is an amenable number.

2113545 is a deficient number, since it is larger than the sum of its proper divisors (1751415).

2113545 is a wasteful number, since it uses less digits than its factorization.

2113545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20144.

The product of its digits is 600, while the sum is 21.

The square root of 2113545 is about 1453.8036318568. The cubic root of 2113545 is about 128.3326511836.

Adding to 2113545 its reverse (5453112), we get a palindrome (7566657).

The spelling of 2113545 in words is "two million, one hundred thirteen thousand, five hundred forty-five".