25414421 has 2 divisors, whose sum is σ = 25414422. Its totient is φ = 25414420.

The previous prime is 25414409. The next prime is 25414429. The reversal of 25414421 is 12441452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 264196 = 5015^2 + 514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25414421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25414429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12707210 + 12707211.

It is an arithmetic number, because the mean of its divisors is an integer number (12707211).

Almost surely, 2^25414421 is an apocalyptic number.

It is an amenable number.

25414421 is a deficient number, since it is larger than the sum of its proper divisors (1).

25414421 is an equidigital number, since it uses as much as digits as its factorization.

25414421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 23.

The square root of 25414421 is about 5041.2717641484. The cubic root of 25414421 is about 294.0086265536.

Adding to 25414421 its reverse (12441452), we get a palindrome (37855873).

The spelling of 25414421 in words is "twenty-five million, four hundred fourteen thousand, four hundred twenty-one".