1051272491 has 2 divisors, whose sum is σ = 1051272492. Its totient is φ = 1051272490.

The previous prime is 1051272463. The next prime is 1051272493. The reversal of 1051272491 is 1942721501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1051272491 - 2²⁶ = 984163627 is a prime.

It is a super-2 number, since 2×1051272491² = 2210347700666690162, which contains 22 as substring.

Together with 1051272493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1051272493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525636245 + 525636246.

It is an arithmetic number, because the mean of its divisors is an integer number (525636246).

Almost surely, 2^1051272491 is an apocalyptic number.

1051272491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051272491 is an equidigital number, since it uses as much as digits as its factorization.

1051272491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1051272491 is about 32423.3325091669. The cubic root of 1051272491 is about 1016.8067800203.

Adding to 1051272491 its reverse (1942721501), we get a palindrome (2993993992).

The spelling of 1051272491 in words is "one billion, fifty-one million, two hundred seventy-two thousand, four hundred ninety-one".