425202021 has 32 divisors (see below), whose sum is σ = 651853440. Its totient is φ = 273744000.

The previous prime is 425201993. The next prime is 425202023. The reversal of 425202021 is 120202524.

It is not a de Polignac number, because 425202021 - 2¹⁴ = 425185637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 425201985 and 425202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425202023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109906 + ... + 113708.

It is an arithmetic number, because the mean of its divisors is an integer number (20370420).

Almost surely, 2^425202021 is an apocalyptic number.

425202021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

425202021 is a deficient number, since it is larger than the sum of its proper divisors (226651419).

425202021 is a wasteful number, since it uses less digits than its factorization.

425202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954 (or 3948 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 425202021 is about 20620.4272749136. The cubic root of 425202021 is about 751.9664078146.

Adding to 425202021 its reverse (120202524), we get a palindrome (545404545).

The spelling of 425202021 in words is "four hundred twenty-five million, two hundred two thousand, twenty-one".