1013200261 has 2 divisors, whose sum is σ = 1013200262. Its totient is φ = 1013200260.

The previous prime is 1013200259. The next prime is 1013200283. The reversal of 1013200261 is 1620023101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 956664900 + 56535361 = 30930^2 + 7519^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013200261 - 2¹ = 1013200259 is a prime.

Together with 1013200259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1013300261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506600130 + 506600131.

It is an arithmetic number, because the mean of its divisors is an integer number (506600131).

Almost surely, 2^1013200261 is an apocalyptic number.

It is an amenable number.

1013200261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013200261 is an equidigital number, since it uses as much as digits as its factorization.

1013200261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1013200261 is about 31830.8067915345. The cubic root of 1013200261 is about 1004.3808669787.

Adding to 1013200261 its reverse (1620023101), we get a palindrome (2633223362).

The spelling of 1013200261 in words is "one billion, thirteen million, two hundred thousand, two hundred sixty-one".