1040501261 has 2 divisors, whose sum is σ = 1040501262. Its totient is φ = 1040501260.

The previous prime is 1040501233. The next prime is 1040501279. The reversal of 1040501261 is 1621050401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943104100 + 97397161 = 30710^2 + 9869^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040501261 - 2¹⁸ = 1040239117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040501291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520250630 + 520250631.

It is an arithmetic number, because the mean of its divisors is an integer number (520250631).

Almost surely, 2^1040501261 is an apocalyptic number.

It is an amenable number.

1040501261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040501261 is an equidigital number, since it uses as much as digits as its factorization.

1040501261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1040501261 is about 32256.8017788497. The cubic root of 1040501261 is about 1013.3221524500.

Adding to 1040501261 its reverse (1621050401), we get a palindrome (2661551662).

The spelling of 1040501261 in words is "one billion, forty million, five hundred one thousand, two hundred sixty-one".