1137011261 has 2 divisors, whose sum is σ = 1137011262. Its totient is φ = 1137011260.

The previous prime is 1137011251. The next prime is 1137011297. The reversal of 1137011261 is 1621107311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1056640036 + 80371225 = 32506^2 + 8965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1137011261 - 2¹⁴ = 1136994877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1137011201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568505630 + 568505631.

It is an arithmetic number, because the mean of its divisors is an integer number (568505631).

Almost surely, 2^1137011261 is an apocalyptic number.

It is an amenable number.

1137011261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1137011261 is an equidigital number, since it uses as much as digits as its factorization.

1137011261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 1137011261 is about 33719.5975806355. The cubic root of 1137011261 is about 1043.7302132288.

Adding to 1137011261 its reverse (1621107311), we get a palindrome (2758118572).

The spelling of 1137011261 in words is "one billion, one hundred thirty-seven million, eleven thousand, two hundred sixty-one".