1205425855 has 8 divisors (see below), whose sum is σ = 1493172864. Its totient is φ = 933232800.

The previous prime is 1205425807. The next prime is 1205425867. The reversal of 1205425855 is 5585245021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1205425855 - 2⁹ = 1205425343 is a prime.

It is a Duffinian number.

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, 3888316 + ... + 3888625.

It is an arithmetic number, because the mean of its divisors is an integer number (186646608).

Almost surely, 2^1205425855 is an apocalyptic number.

1205425855 is a deficient number, since it is larger than the sum of its proper divisors (287747009).

1205425855 is an equidigital number, since it uses as much as digits as its factorization.

1205425855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7776977.

The product of its (nonzero) digits is 80000, while the sum is 37.

The square root of 1205425855 is about 34719.2432953254. The cubic root of 1205425855 is about 1064.2577811042.

The spelling of 1205425855 in words is "one billion, two hundred five million, four hundred twenty-five thousand, eight hundred fifty-five".