25144997 has 2 divisors, whose sum is σ = 25144998. Its totient is φ = 25144996.

The previous prime is 25144991. The next prime is 25145009. The reversal of 25144997 is 79944152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14737921 + 10407076 = 3839^2 + 3226^2 .

It is a cyclic number.

It is not a de Polignac number, because 25144997 - 2¹² = 25140901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25144991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12572498 + 12572499.

It is an arithmetic number, because the mean of its divisors is an integer number (12572499).

Almost surely, 2^25144997 is an apocalyptic number.

It is an amenable number.

25144997 is a deficient number, since it is larger than the sum of its proper divisors (1).

25144997 is an equidigital number, since it uses as much as digits as its factorization.

25144997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 25144997 is about 5014.4787366186. The cubic root of 25144997 is about 292.9659828415.

The spelling of 25144997 in words is "twenty-five million, one hundred forty-four thousand, nine hundred ninety-seven".