420325661 has 8 divisors (see below), whose sum is σ = 493355520. Its totient is φ = 350541648.

The previous prime is 420325651. The next prime is 420325679. The reversal of 420325661 is 166523024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420325661 is a prime.

It is a super-2 number, since 2×420325661² = 353347322590173842, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420325651) 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, 811181 + ... + 811698.

It is an arithmetic number, because the mean of its divisors is an integer number (61669440).

Almost surely, 2^420325661 is an apocalyptic number.

It is an amenable number.

420325661 is a deficient number, since it is larger than the sum of its proper divisors (73029859).

420325661 is a wasteful number, since it uses less digits than its factorization.

420325661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622923.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 420325661 is about 20501.8453071913. The cubic root of 420325661 is about 749.0807469439.

Adding to 420325661 its reverse (166523024), we get a palindrome (586848685).

The spelling of 420325661 in words is "four hundred twenty million, three hundred twenty-five thousand, six hundred sixty-one".