2545705 has 12 divisors (see below), whose sum is σ = 3129156. Its totient is φ = 1988000.

The previous prime is 2545703. The next prime is 2545727. The reversal of 2545705 is 5075452.

It can be written as a sum of positive squares in 2 ways, for example, as 1819801 + 725904 = 1349^2 + 852^2 .

It is not a de Polignac number, because 2545705 - 2¹ = 2545703 is a prime.

It is a super-2 number, since 2×2545705² = 12961227894050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25155 + ... + 25255.

It is an arithmetic number, because the mean of its divisors is an integer number (260763).

2^2545705 is an apocalyptic number.

It is an amenable number.

2545705 is a deficient number, since it is larger than the sum of its proper divisors (583451).

2545705 is an equidigital number, since it uses as much as digits as its factorization.

2545705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 2545705 is about 1595.5265588513. The cubic root of 2545705 is about 136.5429742098.

The spelling of 2545705 in words is "two million, five hundred forty-five thousand, seven hundred five".