1205151906 has 32 divisors (see below), whose sum is σ = 2755958400. Its totient is φ = 344163456.

The previous prime is 1205151887. The next prime is 1205151911. The reversal of 1205151906 is 6091515021.

It is a super-2 number, since 2×1205151906² = 2904782233070865672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101430 + ... + 112686.

It is an arithmetic number, because the mean of its divisors is an integer number (86123700).

Almost surely, 2^1205151906 is an apocalyptic number.

1205151906 is an abundant number, since it is smaller than the sum of its proper divisors (1550806494).

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

1205151906 is a wasteful number, since it uses less digits than its factorization.

1205151906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13818.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 1205151906 is about 34715.2978670787. The cubic root of 1205151906 is about 1064.1771527678.

Adding to 1205151906 its reverse (6091515021), we get a palindrome (7296666927).

The spelling of 1205151906 in words is "one billion, two hundred five million, one hundred fifty-one thousand, nine hundred six".