25041421243 has 4 divisors (see below), whose sum is σ = 26514446040. Its totient is φ = 23568396448.

The previous prime is 25041421231. The next prime is 25041421247. The reversal of 25041421243 is 34212414052.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25041421243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25041421247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736512373 + ... + 736512406.

It is an arithmetic number, because the mean of its divisors is an integer number (6628611510).

Almost surely, 2^25041421243 is an apocalyptic number.

25041421243 is a deficient number, since it is larger than the sum of its proper divisors (1473024797).

25041421243 is a wasteful number, since it uses less digits than its factorization.

25041421243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473024796.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 25041421243 its reverse (34212414052), we get a palindrome (59253835295).

The spelling of 25041421243 in words is "twenty-five billion, forty-one million, four hundred twenty-one thousand, two hundred forty-three".