25229642 has 4 divisors (see below), whose sum is σ = 37844466. Its totient is φ = 12614820.

The previous prime is 25229641. The next prime is 25229653. The reversal of 25229642 is 24692252.

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

It can be written as a sum of positive squares in only one way, i.e., 13402921 + 11826721 = 3661^2 + 3439^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25229599 and 25229608.

It is not an unprimeable number, because it can be changed into a prime (25229641) 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 as a sum of consecutive naturals, namely, 6307409 + ... + 6307412.

Almost surely, 2^25229642 is an apocalyptic number.

25229642 is a deficient number, since it is larger than the sum of its proper divisors (12614824).

25229642 is a wasteful number, since it uses less digits than its factorization.

25229642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12614823.

The product of its digits is 17280, while the sum is 32.

The square root of 25229642 is about 5022.9117053757. The cubic root of 25229642 is about 293.2943494451.

The spelling of 25229642 in words is "twenty-five million, two hundred twenty-nine thousand, six hundred forty-two".