25121633 has 2 divisors, whose sum is σ = 25121634. Its totient is φ = 25121632.

The previous prime is 25121617. The next prime is 25121651. The reversal of 25121633 is 33612152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24137569 + 984064 = 4913^2 + 992^2 .

It is a cyclic number.

It is not a de Polignac number, because 25121633 - 2⁴ = 25121617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25121599 and 25121608.

It is not a weakly prime, because it can be changed into another prime (25121653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560816 + 12560817.

It is an arithmetic number, because the mean of its divisors is an integer number (12560817).

Almost surely, 2^25121633 is an apocalyptic number.

It is an amenable number.

25121633 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121633 is an equidigital number, since it uses as much as digits as its factorization.

25121633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 25121633 is about 5012.1485412944. The cubic root of 25121633 is about 292.8752162325.

Adding to 25121633 its reverse (33612152), we get a palindrome (58733785).

The spelling of 25121633 in words is "twenty-five million, one hundred twenty-one thousand, six hundred thirty-three".