420510653 has 4 divisors (see below), whose sum is σ = 422029020. Its totient is φ = 418992288.

The previous prime is 420510647. The next prime is 420510659. The reversal of 420510653 is 356015024.

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

It is an interprime number because it is at equal distance from previous prime (420510647) and next prime (420510659).

It can be written as a sum of positive squares in 2 ways, for example, as 120077764 + 300432889 = 10958^2 + 17333^2 .

It is a cyclic number.

It is not a de Polignac number, because 420510653 - 2⁸ = 420510397 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 (420510659) 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, 758768 + ... + 759321.

It is an arithmetic number, because the mean of its divisors is an integer number (105507255).

Almost surely, 2^420510653 is an apocalyptic number.

It is an amenable number.

420510653 is a deficient number, since it is larger than the sum of its proper divisors (1518367).

420510653 is a wasteful number, since it uses less digits than its factorization.

420510653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518366.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 420510653 is about 20506.3564047834. The cubic root of 420510653 is about 749.1906249376.

Adding to 420510653 its reverse (356015024), we get a palindrome (776525677).

The spelling of 420510653 in words is "four hundred twenty million, five hundred ten thousand, six hundred fifty-three".