1205125390 has 16 divisors (see below), whose sum is σ = 2479115232. Its totient is φ = 413185824.

The previous prime is 1205125379. The next prime is 1205125417. The reversal of 1205125390 is 935215021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8607969 + ... + 8608108.

It is an arithmetic number, because the mean of its divisors is an integer number (154944702).

Almost surely, 2^1205125390 is an apocalyptic number.

1205125390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1205125390 is an abundant number, since it is smaller than the sum of its proper divisors (1273989842).

1205125390 is a wasteful number, since it uses less digits than its factorization.

1205125390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17216091.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 1205125390 is about 34714.9159584176. The cubic root of 1205125390 is about 1064.1693479624.

The spelling of 1205125390 in words is "one billion, two hundred five million, one hundred twenty-five thousand, three hundred ninety".