1051541021 has 4 divisors (see below), whose sum is σ = 1051833312. Its totient is φ = 1051248732.

The previous prime is 1051541017. The next prime is 1051541047. The reversal of 1051541021 is 1201451501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1051541021 - 2² = 1051541017 is a prime.

It is a super-2 number, since 2×1051541021² = 2211477037691444882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1051540984 and 1051541002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051541321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140681 + ... + 147966.

It is an arithmetic number, because the mean of its divisors is an integer number (262958328).

Almost surely, 2^1051541021 is an apocalyptic number.

It is an amenable number.

1051541021 is a deficient number, since it is larger than the sum of its proper divisors (292291).

1051541021 is an equidigital number, since it uses as much as digits as its factorization.

1051541021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292290.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1051541021 is about 32427.4732441490. The cubic root of 1051541021 is about 1016.8933480865.

Adding to 1051541021 its reverse (1201451501), we get a palindrome (2252992522).

The spelling of 1051541021 in words is "one billion, fifty-one million, five hundred forty-one thousand, twenty-one".