420534025 has 12 divisors (see below), whose sum is σ = 527747472. Its totient is φ = 332372240.

The previous prime is 420534019. The next prime is 420534031. The reversal of 420534025 is 520435024.

It is an interprime number because it is at equal distance from previous prime (420534019) and next prime (420534031).

It is not a de Polignac number, because 420534025 - 2⁹ = 420533513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99259 + ... + 103408.

It is an arithmetic number, because the mean of its divisors is an integer number (43978956).

Almost surely, 2^420534025 is an apocalyptic number.

It is an amenable number.

420534025 is a deficient number, since it is larger than the sum of its proper divisors (107213447).

420534025 is a wasteful number, since it uses less digits than its factorization.

420534025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202760 (or 202755 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 420534025 is about 20506.9262689463. The cubic root of 420534025 is about 749.2045046961.

Adding to 420534025 its reverse (520435024), we get a palindrome (940969049).

Subtracting 420534025 from its reverse (520435024), we obtain a palindrome (99900999).

The spelling of 420534025 in words is "four hundred twenty million, five hundred thirty-four thousand, twenty-five".