1205245420 has 12 divisors (see below), whose sum is σ = 2531015424. Its totient is φ = 482098160.

The previous prime is 1205245417. The next prime is 1205245421. The reversal of 1205245420 is 245425021.

It is not an unprimeable number, because it can be changed into a prime (1205245421) 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, 30131116 + ... + 30131155.

It is an arithmetic number, because the mean of its divisors is an integer number (210917952).

Almost surely, 2^1205245420 is an apocalyptic number.

1205245420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205245420 is an abundant number, since it is smaller than the sum of its proper divisors (1325770004).

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

1205245420 is a wasteful number, since it uses less digits than its factorization.

1205245420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60262280 (or 60262278 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1205245420 is about 34716.6447111468. The cubic root of 1205245420 is about 1064.2046770680.

The spelling of 1205245420 in words is "one billion, two hundred five million, two hundred forty-five thousand, four hundred twenty".