1051422021 has 12 divisors (see below), whose sum is σ = 1635545548. Its totient is φ = 647028864.

The previous prime is 1051422017. The next prime is 1051422037. The reversal of 1051422021 is 1202241501.

It can be written as a sum of positive squares in 2 ways, for example, as 383768100 + 667653921 = 19590^2 + 25839^2 .

It is not a de Polignac number, because 1051422021 - 2² = 1051422017 is a prime.

It is a super-2 number, since 2×1051422021² = 2210976532487448882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1051421985 and 1051422003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051422011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4493140 + ... + 4493373.

Almost surely, 2^1051422021 is an apocalyptic number.

It is an amenable number.

1051422021 is a deficient number, since it is larger than the sum of its proper divisors (584123527).

1051422021 is a wasteful number, since it uses less digits than its factorization.

1051422021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8986532 (or 8986529 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1051422021 is about 32425.6383283352. The cubic root of 1051422021 is about 1016.8549869666.

Adding to 1051422021 its reverse (1202241501), we get a palindrome (2253663522).

The spelling of 1051422021 in words is "one billion, fifty-one million, four hundred twenty-two thousand, twenty-one".