1205057263 has 4 divisors (see below), whose sum is σ = 1205903160. Its totient is φ = 1204211368.

The previous prime is 1205057251. The next prime is 1205057267. The reversal of 1205057263 is 3627505021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205057263 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 (1205057267) 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, 420808 + ... + 423661.

It is an arithmetic number, because the mean of its divisors is an integer number (301475790).

Almost surely, 2^1205057263 is an apocalyptic number.

1205057263 is a deficient number, since it is larger than the sum of its proper divisors (845897).

1205057263 is an equidigital number, since it uses as much as digits as its factorization.

1205057263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845896.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 1205057263 is about 34713.9347092778. The cubic root of 1205057263 is about 1064.1492947154.

The spelling of 1205057263 in words is "one billion, two hundred five million, fifty-seven thousand, two hundred sixty-three".