25124212501 has 4 divisors (see below), whose sum is σ = 26602107372. Its totient is φ = 23646317632.

The previous prime is 25124212489. The next prime is 25124212517. The reversal of 25124212501 is 10521242152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16525359601 + 8598852900 = 128551^2 + 92730^2 .

It is a cyclic number.

It is not a de Polignac number, because 25124212501 - 2²⁷ = 24989994773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25124242501) 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 in 3 ways as a sum of consecutive naturals, for example, 738947410 + ... + 738947443.

It is an arithmetic number, because the mean of its divisors is an integer number (6650526843).

Almost surely, 2^25124212501 is an apocalyptic number.

It is an amenable number.

25124212501 is a deficient number, since it is larger than the sum of its proper divisors (1477894871).

25124212501 is a wasteful number, since it uses less digits than its factorization.

25124212501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477894870.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 25124212501 its reverse (10521242152), we get a palindrome (35645454653).

The spelling of 25124212501 in words is "twenty-five billion, one hundred twenty-four million, two hundred twelve thousand, five hundred one".