425442021 has 8 divisors (see below), whose sum is σ = 582587424. Its totient is φ = 275962320.

The previous prime is 425442007. The next prime is 425442037. The reversal of 425442021 is 120244524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 425442021 - 2¹⁵ = 425409253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 425441982 and 425442000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425442041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1916295 + ... + 1916516.

It is an arithmetic number, because the mean of its divisors is an integer number (72823428).

Almost surely, 2^425442021 is an apocalyptic number.

It is an amenable number.

425442021 is a deficient number, since it is larger than the sum of its proper divisors (157145403).

425442021 is a wasteful number, since it uses less digits than its factorization.

425442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832851.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 425442021 is about 20626.2459260041. The cubic root of 425442021 is about 752.1078605708.

Adding to 425442021 its reverse (120244524), we get a palindrome (545686545).

The spelling of 425442021 in words is "four hundred twenty-five million, four hundred forty-two thousand, twenty-one".