1205262101 has 4 divisors (see below), whose sum is σ = 1205613804. Its totient is φ = 1204910400.

The previous prime is 1205262083. The next prime is 1205262137. The reversal of 1205262101 is 1012625021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 301057201 + 904204900 = 17351^2 + 30070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205262101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205262001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170660 + ... + 177581.

It is an arithmetic number, because the mean of its divisors is an integer number (301403451).

Almost surely, 2^1205262101 is an apocalyptic number.

It is an amenable number.

1205262101 is a deficient number, since it is larger than the sum of its proper divisors (351703).

1205262101 is an equidigital number, since it uses as much as digits as its factorization.

1205262101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351702.

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

The square root of 1205262101 is about 34716.8849553067. The cubic root of 1205262101 is about 1064.2095866950.

Adding to 1205262101 its reverse (1012625021), we get a palindrome (2217887122).

The spelling of 1205262101 in words is "one billion, two hundred five million, two hundred sixty-two thousand, one hundred one".