2145869 has 8 divisors (see below), whose sum is σ = 2351712. Its totient is φ = 1941840.

The previous prime is 2145853. The next prime is 2145937. The reversal of 2145869 is 9685412.

2145869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2145869 - 2⁴ = 2145853 is a prime.

It is a super-2 number, since 2×2145869² = 9209507530322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3842 + ... + 4364.

It is an arithmetic number, because the mean of its divisors is an integer number (293964).

2^2145869 is an apocalyptic number.

It is an amenable number.

2145869 is a deficient number, since it is larger than the sum of its proper divisors (205843).

2145869 is a wasteful number, since it uses less digits than its factorization.

2145869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907.

The product of its digits is 17280, while the sum is 35.

The square root of 2145869 is about 1464.8784932546. The cubic root of 2145869 is about 128.9835726132.

The spelling of 2145869 in words is "two million, one hundred forty-five thousand, eight hundred sixty-nine".