1051435421 has 2 divisors, whose sum is σ = 1051435422. Its totient is φ = 1051435420.

The previous prime is 1051435391. The next prime is 1051435493. The reversal of 1051435421 is 1245341501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1049436025 + 1999396 = 32395^2 + 1414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051435421 is a prime.

It is a super-2 number, since 2×1051435421² = 2211032889066894482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051435321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525717710 + 525717711.

It is an arithmetic number, because the mean of its divisors is an integer number (525717711).

Almost surely, 2^1051435421 is an apocalyptic number.

It is an amenable number.

1051435421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051435421 is an equidigital number, since it uses as much as digits as its factorization.

1051435421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1051435421 is about 32425.8449542953. The cubic root of 1051435421 is about 1016.8593067668.

Adding to 1051435421 its reverse (1245341501), we get a palindrome (2296776922).

The spelling of 1051435421 in words is "one billion, fifty-one million, four hundred thirty-five thousand, four hundred twenty-one".