1051320157 has 2 divisors, whose sum is σ = 1051320158. Its totient is φ = 1051320156.

The previous prime is 1051320139. The next prime is 1051320161. The reversal of 1051320157 is 7510231501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1051121241 + 198916 = 32421^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051320157 - 2¹⁹ = 1050795869 is a prime.

It is a super-2 number, since 2×1051320157² = 2210548145029009298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051320107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525660078 + 525660079.

It is an arithmetic number, because the mean of its divisors is an integer number (525660079).

Almost surely, 2^1051320157 is an apocalyptic number.

It is an amenable number.

1051320157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051320157 is an equidigital number, since it uses as much as digits as its factorization.

1051320157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 1051320157 is about 32424.0675579114. The cubic root of 1051320157 is about 1016.8221475487.

Adding to 1051320157 its reverse (7510231501), we get a palindrome (8561551658).

The spelling of 1051320157 in words is "one billion, fifty-one million, three hundred twenty thousand, one hundred fifty-seven".