2145929 has 4 divisors (see below), whose sum is σ = 2155776. Its totient is φ = 2136084.

The previous prime is 2145853. The next prime is 2145937. The reversal of 2145929 is 9295412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145929 is a prime.

It is a super-2 number, since 2×2145929² = 9210022546082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145895 and 2145904.

It is not an unprimeable number, because it can be changed into a prime (2145329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4589 + ... + 5034.

It is an arithmetic number, because the mean of its divisors is an integer number (538944).

2^2145929 is an apocalyptic number.

It is an amenable number.

2145929 is a deficient number, since it is larger than the sum of its proper divisors (9847).

2145929 is an equidigital number, since it uses as much as digits as its factorization.

2145929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9846.

The product of its digits is 6480, while the sum is 32.

The square root of 2145929 is about 1464.8989726258. The cubic root of 2145929 is about 128.9847747590.

The spelling of 2145929 in words is "two million, one hundred forty-five thousand, nine hundred twenty-nine".