420521351 has 8 divisors (see below), whose sum is σ = 443737440. Its totient is φ = 397716352.

The previous prime is 420521341. The next prime is 420521377. The reversal of 420521351 is 153125024.

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

It is a cyclic number.

It is not a de Polignac number, because 420521351 - 2²⁶ = 353412487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420521341) 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, 100670 + ... + 104763.

It is an arithmetic number, because the mean of its divisors is an integer number (55467180).

Almost surely, 2^420521351 is an apocalyptic number.

420521351 is a deficient number, since it is larger than the sum of its proper divisors (23216089).

420521351 is a wasteful number, since it uses less digits than its factorization.

420521351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205545.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 420521351 is about 20506.6172490735. The cubic root of 420521351 is about 749.1969781444.

Adding to 420521351 its reverse (153125024), we get a palindrome (573646375).

The spelling of 420521351 in words is "four hundred twenty million, five hundred twenty-one thousand, three hundred fifty-one".