25121671 has 2 divisors, whose sum is σ = 25121672. Its totient is φ = 25121670.

The previous prime is 25121659. The next prime is 25121683. The reversal of 25121671 is 17612152.

It is a balanced prime because it is at equal distance from previous prime (25121659) and next prime (25121683).

It is a cyclic number.

It is not a de Polignac number, because 25121671 - 2¹⁹ = 24597383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25121611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560835 + 12560836.

It is an arithmetic number, because the mean of its divisors is an integer number (12560836).

Almost surely, 2^25121671 is an apocalyptic number.

25121671 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121671 is an equidigital number, since it uses as much as digits as its factorization.

25121671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 25121671 is about 5012.1523320825. The cubic root of 25121671 is about 292.8753639041.

The spelling of 25121671 in words is "twenty-five million, one hundred twenty-one thousand, six hundred seventy-one".