25690049 has 16 divisors (see below), whose sum is σ = 32778240. Its totient is φ = 19550160.

The previous prime is 25690039. The next prime is 25690069. The reversal of 25690049 is 94009652.

It is not a de Polignac number, because 25690049 - 2¹² = 25685953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25690039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569 + ... + 7190.

It is an arithmetic number, because the mean of its divisors is an integer number (2048640).

Almost surely, 2^25690049 is an apocalyptic number.

It is an amenable number.

25690049 is a deficient number, since it is larger than the sum of its proper divisors (7088191).

25690049 is a wasteful number, since it uses less digits than its factorization.

25690049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7820.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 25690049 is about 5068.5351927357. The cubic root of 25690049 is about 295.0676814927.

The spelling of 25690049 in words is "twenty-five million, six hundred ninety thousand, forty-nine".