25209051 has 16 divisors (see below), whose sum is σ = 39308544. Its totient is φ = 14069664.

The previous prime is 25209049. The next prime is 25209053. The reversal of 25209051 is 15090252.

It is an interprime number because it is at equal distance from previous prime (25209049) and next prime (25209053).

It is not a de Polignac number, because 25209051 - 2¹ = 25209049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25209053) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13056 + ... + 14861.

It is an arithmetic number, because the mean of its divisors is an integer number (2456784).

Almost surely, 2^25209051 is an apocalyptic number.

25209051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25209051 is a deficient number, since it is larger than the sum of its proper divisors (14099493).

25209051 is a wasteful number, since it uses less digits than its factorization.

25209051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27970.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 25209051 is about 5020.8615794503. The cubic root of 25209051 is about 293.2145376685.

The spelling of 25209051 in words is "twenty-five million, two hundred nine thousand, fifty-one".