1040101261 has 2 divisors, whose sum is σ = 1040101262. Its totient is φ = 1040101260.

The previous prime is 1040101229. The next prime is 1040101267. The reversal of 1040101261 is 1621010401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 656333161 + 383768100 = 25619^2 + 19590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040101261 - 2⁵ = 1040101229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040101267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520050630 + 520050631.

It is an arithmetic number, because the mean of its divisors is an integer number (520050631).

Almost surely, 2^1040101261 is an apocalyptic number.

It is an amenable number.

1040101261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040101261 is an equidigital number, since it uses as much as digits as its factorization.

1040101261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1040101261 is about 32250.6009401375. The cubic root of 1040101261 is about 1013.1922852961.

Adding to 1040101261 its reverse (1621010401), we get a palindrome (2661111662).

The spelling of 1040101261 in words is "one billion, forty million, one hundred one thousand, two hundred sixty-one".