2109457 has 8 divisors (see below), whose sum is σ = 2488832. Its totient is φ = 1749600.

The previous prime is 2109449. The next prime is 2109461. The reversal of 2109457 is 7549012.

It is a happy number.

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 2109457 - 2³ = 2109449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4644 + ... + 5077.

It is an arithmetic number, because the mean of its divisors is an integer number (311104).

2^2109457 is an apocalyptic number.

It is an amenable number.

2109457 is a deficient number, since it is larger than the sum of its proper divisors (379375).

2109457 is an equidigital number, since it uses as much as digits as its factorization.

2109457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9759.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 2109457 is about 1452.3969842987. The cubic root of 2109457 is about 128.2498578225.

The spelling of 2109457 in words is "two million, one hundred nine thousand, four hundred fifty-seven".