2457445 has 4 divisors (see below), whose sum is σ = 2948940. Its totient is φ = 1965952.

The previous prime is 2457439. The next prime is 2457449. The reversal of 2457445 is 5447542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5447542 = 2 ⋅2723771.

It can be written as a sum of positive squares in 2 ways, for example, as 1684804 + 772641 = 1298^2 + 879^2 .

It is a cyclic number.

It is not a de Polignac number, because 2457445 - 2⁷ = 2457317 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2457449) 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, 245740 + ... + 245749.

It is an arithmetic number, because the mean of its divisors is an integer number (737235).

2^2457445 is an apocalyptic number.

It is an amenable number.

2457445 is a deficient number, since it is larger than the sum of its proper divisors (491495).

2457445 is an equidigital number, since it uses as much as digits as its factorization.

2457445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491494.

The product of its digits is 22400, while the sum is 31.

The square root of 2457445 is about 1567.6239982853. The cubic root of 2457445 is about 134.9463893213.

The spelling of 2457445 in words is "two million, four hundred fifty-seven thousand, four hundred forty-five".