4425253421 has 4 divisors (see below), whose sum is σ = 4426534752. Its totient is φ = 4423972092.

The previous prime is 4425253409. The next prime is 4425253433. The reversal of 4425253421 is 1243525244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (4425253409) and next prime (4425253433).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4425253421 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 (4425253471) 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, 635471 + ... + 642396.

It is an arithmetic number, because the mean of its divisors is an integer number (1106633688).

Almost surely, 2^4425253421 is an apocalyptic number.

It is an amenable number.

4425253421 is a deficient number, since it is larger than the sum of its proper divisors (1281331).

4425253421 is a wasteful number, since it uses less digits than its factorization.

4425253421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281330.

The product of its digits is 38400, while the sum is 32.

The square root of 4425253421 is about 66522.5782798592. The cubic root of 4425253421 is about 1641.7715119013.

Adding to 4425253421 its reverse (1243525244), we get a palindrome (5668778665).

The spelling of 4425253421 in words is "four billion, four hundred twenty-five million, two hundred fifty-three thousand, four hundred twenty-one".