1051242021 has 6 divisors (see below), whose sum is σ = 1518460710. Its totient is φ = 700828008.

The previous prime is 1051242011. The next prime is 1051242041. The reversal of 1051242021 is 1202421501.

It can be written as a sum of positive squares in only one way, i.e., 1050732225 + 509796 = 32415^2 + 714^2 .

It is not a de Polignac number, because 1051242021 - 2⁶ = 1051241957 is a prime.

It is a super-2 number, since 2×1051242021² = 2210219573432328882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1051241985 and 1051242003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051242001) 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, 58402326 + ... + 58402343.

It is an arithmetic number, because the mean of its divisors is an integer number (253076785).

Almost surely, 2^1051242021 is an apocalyptic number.

It is an amenable number.

1051242021 is a deficient number, since it is larger than the sum of its proper divisors (467218689).

1051242021 is a wasteful number, since it uses less digits than its factorization.

1051242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116804675 (or 116804672 counting only the distinct ones).

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

The square root of 1051242021 is about 32422.8626280901. The cubic root of 1051242021 is about 1016.7969562426.

Adding to 1051242021 its reverse (1202421501), we get a palindrome (2253663522).

The spelling of 1051242021 in words is "one billion, fifty-one million, two hundred forty-two thousand, twenty-one".