1145571906 has 16 divisors (see below), whose sum is σ = 2312164800. Its totient is φ = 378353808.

The previous prime is 1145571827. The next prime is 1145571913. The reversal of 1145571906 is 6091755411.

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, 875166 + ... + 876473.

It is an arithmetic number, because the mean of its divisors is an integer number (144510300).

Almost surely, 2^1145571906 is an apocalyptic number.

1145571906 is an abundant number, since it is smaller than the sum of its proper divisors (1166592894).

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

1145571906 is a wasteful number, since it uses less digits than its factorization.

1145571906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751753.

The product of its (nonzero) digits is 37800, while the sum is 39.

The square root of 1145571906 is about 33846.2982614052. The cubic root of 1145571906 is about 1046.3431082091.

The spelling of 1145571906 in words is "one billion, one hundred forty-five million, five hundred seventy-one thousand, nine hundred six".