1205397126 has 112 divisors (see below), whose sum is σ = 2910965040. Its totient is φ = 373014720.

The previous prime is 1205397071. The next prime is 1205397139. The reversal of 1205397126 is 6217935021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1467796 + ... + 1468616.

Almost surely, 2^1205397126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1205397126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1455482520).

1205397126 is an abundant number, since it is smaller than the sum of its proper divisors (1705567914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205397126 is an equidigital number, since it uses as much as digits as its factorization.

1205397126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1205397126 is about 34718.8295597648. The cubic root of 1205397126 is about 1064.2493261933.

The spelling of 1205397126 in words is "one billion, two hundred five million, three hundred ninety-seven thousand, one hundred twenty-six".