1031420421 has 6 divisors (see below), whose sum is σ = 1489829510. Its totient is φ = 687613608.

The previous prime is 1031420417. The next prime is 1031420443. The reversal of 1031420421 is 1240241301.

1031420421 is a `hidden beast` number, since 103 + 142 + 0 + 421 = 666.

It can be written as a sum of positive squares in only one way, i.e., 942797025 + 88623396 = 30705^2 + 9414^2 .

It is not a de Polignac number, because 1031420421 - 2² = 1031420417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031420394 and 1031420403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031420461) 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, 57301126 + ... + 57301143.

Almost surely, 2^1031420421 is an apocalyptic number.

It is an amenable number.

1031420421 is a deficient number, since it is larger than the sum of its proper divisors (458409089).

1031420421 is a wasteful number, since it uses less digits than its factorization.

1031420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114602275 (or 114602272 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1031420421 is about 32115.7347884180. The cubic root of 1031420421 is about 1010.3656555985.

Adding to 1031420421 its reverse (1240241301), we get a palindrome (2271661722).

The spelling of 1031420421 in words is "one billion, thirty-one million, four hundred twenty thousand, four hundred twenty-one".