1205425644 has 12 divisors (see below), whose sum is σ = 2812659864. Its totient is φ = 401808544.

The previous prime is 1205425633. The next prime is 1205425657. The reversal of 1205425644 is 4465245021.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50226057 + ... + 50226080.

It is an arithmetic number, because the mean of its divisors is an integer number (234388322).

Almost surely, 2^1205425644 is an apocalyptic number.

It is an amenable number.

1205425644 is an abundant number, since it is smaller than the sum of its proper divisors (1607234220).

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

1205425644 is a wasteful number, since it uses less digits than its factorization.

1205425644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100452144 (or 100452142 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 1205425644 is about 34719.2402566646. The cubic root of 1205425644 is about 1064.2577190077.

The spelling of 1205425644 in words is "one billion, two hundred five million, four hundred twenty-five thousand, six hundred forty-four".