1020420351 has 6 divisors (see below), whose sum is σ = 1473940520. Its totient is φ = 680280228.

The previous prime is 1020420347. The next prime is 1020420367. The reversal of 1020420351 is 1530240201.

It is not a de Polignac number, because 1020420351 - 2² = 1020420347 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 (1020420551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56690011 + ... + 56690028.

Almost surely, 2^1020420351 is an apocalyptic number.

1020420351 is a deficient number, since it is larger than the sum of its proper divisors (453520169).

1020420351 is a wasteful number, since it uses less digits than its factorization.

1020420351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113380045 (or 113380042 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1020420351 is about 31944.0190176502. The cubic root of 1020420351 is about 1006.7609699359.

Adding to 1020420351 its reverse (1530240201), we get a palindrome (2550660552).

The spelling of 1020420351 in words is "one billion, twenty million, four hundred twenty thousand, three hundred fifty-one".