25121471 has 2 divisors, whose sum is σ = 25121472. Its totient is φ = 25121470.

The previous prime is 25121443. The next prime is 25121507. The reversal of 25121471 is 17412152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25121471 - 2¹⁸ = 24859327 is a prime.

It is a super-3 number, since 3×25121471³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain 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 (25121441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560735 + 12560736.

It is an arithmetic number, because the mean of its divisors is an integer number (12560736).

Almost surely, 2^25121471 is an apocalyptic number.

25121471 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121471 is an equidigital number, since it uses as much as digits as its factorization.

25121471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 23.

The square root of 25121471 is about 5012.1323805343. The cubic root of 25121471 is about 292.8745866837.

The spelling of 25121471 in words is "twenty-five million, one hundred twenty-one thousand, four hundred seventy-one".