1051251321 has 16 divisors (see below), whose sum is σ = 1509278400. Its totient is φ = 648427008.

The previous prime is 1051251283. The next prime is 1051251337. The reversal of 1051251321 is 1231521501.

It is not a de Polignac number, because 1051251321 - 2¹¹ = 1051249273 is a prime.

It is a super-2 number, since 2×1051251321² = 2210258679808490082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051251391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171676 + ... + 177693.

It is an arithmetic number, because the mean of its divisors is an integer number (94329900).

Almost surely, 2^1051251321 is an apocalyptic number.

It is an amenable number.

1051251321 is a deficient number, since it is larger than the sum of its proper divisors (458027079).

1051251321 is a wasteful number, since it uses less digits than its factorization.

1051251321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349448.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1051251321 is about 32423.0060450909. The cubic root of 1051251321 is about 1016.7999546589.

Adding to 1051251321 its reverse (1231521501), we get a palindrome (2282772822).

The spelling of 1051251321 in words is "one billion, fifty-one million, two hundred fifty-one thousand, three hundred twenty-one".