1205099420 has 48 divisors (see below), whose sum is σ = 2913093120. Its totient is φ = 410197824.

The previous prime is 1205099419. The next prime is 1205099431. The reversal of 1205099420 is 249905021.

It is a super-2 number, since 2×1205099420² = 2904529224168672800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11504 + ... + 50423.

It is an arithmetic number, because the mean of its divisors is an integer number (60689440).

Almost surely, 2^1205099420 is an apocalyptic number.

1205099420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205099420 is an abundant number, since it is smaller than the sum of its proper divisors (1707993700).

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

1205099420 is a wasteful number, since it uses less digits than its factorization.

1205099420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62082 (or 62080 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1205099420 is about 34714.5419096954. The cubic root of 1205099420 is about 1064.1617037575.

The spelling of 1205099420 in words is "one billion, two hundred five million, ninety-nine thousand, four hundred twenty".