1185252921 has 12 divisors (see below), whose sum is σ = 1716886548. Its totient is φ = 787928064.

The previous prime is 1185252919. The next prime is 1185252949. The reversal of 1185252921 is 1292525811.

It can be written as a sum of positive squares in 2 ways, for example, as 859955625 + 325297296 = 29325^2 + 18036^2 .

It is not a de Polignac number, because 1185252921 - 2¹ = 1185252919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1185252821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183360 + ... + 189713.

It is an arithmetic number, because the mean of its divisors is an integer number (143073879).

Almost surely, 2^1185252921 is an apocalyptic number.

It is an amenable number.

1185252921 is a deficient number, since it is larger than the sum of its proper divisors (531633627).

1185252921 is a wasteful number, since it uses less digits than its factorization.

1185252921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373432 (or 373429 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 1185252921 is about 34427.5023927092. The cubic root of 1185252921 is about 1058.2875283267.

The spelling of 1185252921 in words is "one billion, one hundred eighty-five million, two hundred fifty-two thousand, nine hundred twenty-one".