2109451 has 4 divisors (see below), whose sum is σ = 2158552. Its totient is φ = 2060352.

The previous prime is 2109449. The next prime is 2109461. The reversal of 2109451 is 1549012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2109451 - 2¹ = 2109449 is a prime.

It is a Duffinian number.

2109451 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2109421) 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, 24486 + ... + 24571.

It is an arithmetic number, because the mean of its divisors is an integer number (539638).

2^2109451 is an apocalyptic number.

2109451 is a deficient number, since it is larger than the sum of its proper divisors (49101).

2109451 is an equidigital number, since it uses as much as digits as its factorization.

2109451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49100.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2109451 is about 1452.3949187463. The cubic root of 2109451 is about 128.2497362273.

It can be divided in two parts, 2109 and 451, that multiplied together give a palindrome (951159).

The spelling of 2109451 in words is "two million, one hundred nine thousand, four hundred fifty-one".