25690501 has 2 divisors, whose sum is σ = 25690502. Its totient is φ = 25690500.

The previous prime is 25690487. The next prime is 25690513. The reversal of 25690501 is 10509652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17430625 + 8259876 = 4175^2 + 2874^2 .

It is a cyclic number.

It is not a de Polignac number, because 25690501 - 2⁷ = 25690373 is a prime.

It is a super-3 number, since 3×25690501³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 25690501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25690571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12845250 + 12845251.

It is an arithmetic number, because the mean of its divisors is an integer number (12845251).

Almost surely, 2^25690501 is an apocalyptic number.

It is an amenable number.

25690501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25690501 is an equidigital number, since it uses as much as digits as its factorization.

25690501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 25690501 is about 5068.5797813589. The cubic root of 25690501 is about 295.0694119916.

The spelling of 25690501 in words is "twenty-five million, six hundred ninety thousand, five hundred one".