25420253 has 8 divisors (see below), whose sum is σ = 26962488. Its totient is φ = 23883264.

The previous prime is 25420237. The next prime is 25420277. The reversal of 25420253 is 35202452.

It can be written as a sum of positive squares in 4 ways, for example, as 38809 + 25381444 = 197^2 + 5038^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25420253 - 2⁴ = 25420237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25420453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13625 + ... + 15377.

It is an arithmetic number, because the mean of its divisors is an integer number (3370311).

Almost surely, 2^25420253 is an apocalyptic number.

It is an amenable number.

25420253 is a deficient number, since it is larger than the sum of its proper divisors (1542235).

25420253 is a wasteful number, since it uses less digits than its factorization.

25420253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 25420253 is about 5041.8501564406. The cubic root of 25420253 is about 294.0311141427.

The spelling of 25420253 in words is "twenty-five million, four hundred twenty thousand, two hundred fifty-three".