25290005 has 18 divisors (see below), whose sum is σ = 33053094. Its totient is φ = 18567744.

The previous prime is 25289993. The next prime is 25290019. The reversal of 25290005 is 50009252.

25290005 = T₁₉₆₆ + T₁₉₆₇ + ... + T₁₉₇₈.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 3378244 + 21911761 = 1838^2 + 4681^2 .

It is not a de Polignac number, because 25290005 - 2¹⁴ = 25273621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 146099 + ... + 146271.

It is an arithmetic number, because the mean of its divisors is an integer number (1836283).

Almost surely, 2^25290005 is an apocalyptic number.

It is an amenable number.

25290005 is a deficient number, since it is larger than the sum of its proper divisors (7763089).

25290005 is an equidigital number, since it uses as much as digits as its factorization.

25290005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 25290005 is about 5028.9168813970. The cubic root of 25290005 is about 293.5280695835.

Adding to 25290005 its reverse (50009252), we get a palindrome (75299257).

The spelling of 25290005 in words is "twenty-five million, two hundred ninety thousand, five".