1185942402 has 18 divisors (see below), whose sum is σ = 2569858473. Its totient is φ = 395265432.

The previous prime is 1185942397. The next prime is 1185942409. The reversal of 1185942402 is 2042495811.

It can be written as a sum of positive squares in 2 ways, for example, as 939483801 + 246458601 = 30651^2 + 15699^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24351.

It is not an unprimeable number, because it can be changed into a prime (1185942409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 142048 + ... + 150164.

Almost surely, 2^1185942402 is an apocalyptic number.

1185942402 is an abundant number, since it is smaller than the sum of its proper divisors (1383916071).

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

1185942402 is an frugal number, since it uses more digits than its factorization.

1185942402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16242 (or 8122 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1185942402 is about 34437.5144573472. The cubic root of 1185942402 is about 1058.4926962671.

The spelling of 1185942402 in words is "one billion, one hundred eighty-five million, nine hundred forty-two thousand, four hundred two".