2145117 has 12 divisors (see below), whose sum is σ = 3097824. Its totient is φ = 1319760.

The previous prime is 2145113. The next prime is 2145131. The reversal of 2145117 is 7115412.

It is a happy number.

It is not a de Polignac number, because 2145117 - 2² = 2145113 is a prime.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2145093 and 2145102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1609 + ... + 2622.

It is an arithmetic number, because the mean of its divisors is an integer number (258152).

2^2145117 is an apocalyptic number.

It is an amenable number.

2145117 is a deficient number, since it is larger than the sum of its proper divisors (952707).

2145117 is a wasteful number, since it uses less digits than its factorization.

2145117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260 (or 4247 counting only the distinct ones).

The product of its digits is 280, while the sum is 21.

The square root of 2145117 is about 1464.6217941844. The cubic root of 2145117 is about 128.9685038184.

The spelling of 2145117 in words is "two million, one hundred forty-five thousand, one hundred seventeen".