1205156030 has 16 divisors (see below), whose sum is σ = 2336148864. Its totient is φ = 444980640.

The previous prime is 1205156023. The next prime is 1205156039. The reversal of 1205156030 is 306515021.

It is a junction number, because it is equal to n+sod(n) for n = 1205155987 and 1205156005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205156039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4635086 + ... + 4635345.

It is an arithmetic number, because the mean of its divisors is an integer number (146009304).

Almost surely, 2^1205156030 is an apocalyptic number.

1205156030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1205156030 is a deficient number, since it is larger than the sum of its proper divisors (1130992834).

1205156030 is a wasteful number, since it uses less digits than its factorization.

1205156030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9270451.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1205156030 is about 34715.3572644730. The cubic root of 1205156030 is about 1064.1783666291.

The spelling of 1205156030 in words is "one billion, two hundred five million, one hundred fifty-six thousand, thirty".