2145121 has 8 divisors (see below), whose sum is σ = 2354688. Its totient is φ = 1938000.

The previous prime is 2145113. The next prime is 2145131. The reversal of 2145121 is 1215412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145121 - 2³ = 2145113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145095 and 2145104.

It is not an unprimeable number, because it can be changed into a prime (2145131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1591 + ... + 2611.

It is an arithmetic number, because the mean of its divisors is an integer number (294336).

2^2145121 is an apocalyptic number.

It is an amenable number.

2145121 is a deficient number, since it is larger than the sum of its proper divisors (209567).

2145121 is a wasteful number, since it uses less digits than its factorization.

2145121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223.

The product of its digits is 80, while the sum is 16.

The square root of 2145121 is about 1464.6231597240. The cubic root of 2145121 is about 128.9685839808.

It can be divided in two parts, 214 and 5121, that added together give a palindrome (5335).

The spelling of 2145121 in words is "two million, one hundred forty-five thousand, one hundred twenty-one".