25405069 has 2 divisors, whose sum is σ = 25405070. Its totient is φ = 25405068.

The previous prime is 25405067. The next prime is 25405091. The reversal of 25405069 is 96050452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17952169 + 7452900 = 4237^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 25405069 - 2¹ = 25405067 is a prime.

It is a super-2 number, since 2×25405069² = 1290835061789522, which contains 22 as substring.

Together with 25405067, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25405069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25405067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12702534 + 12702535.

It is an arithmetic number, because the mean of its divisors is an integer number (12702535).

Almost surely, 2^25405069 is an apocalyptic number.

It is an amenable number.

25405069 is a deficient number, since it is larger than the sum of its proper divisors (1).

25405069 is an equidigital number, since it uses as much as digits as its factorization.

25405069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 25405069 is about 5040.3441350765. The cubic root of 25405069 is about 293.9725590258.

The spelling of 25405069 in words is "twenty-five million, four hundred five thousand, sixty-nine".