1155205402 has 16 divisors (see below), whose sum is σ = 1867690440. Its totient is φ = 532717632.

The previous prime is 1155205399. The next prime is 1155205411. The reversal of 1155205402 is 2045025511.

It can be written as a sum of positive squares in 4 ways, for example, as 779582241 + 375623161 = 27921^2 + 19381^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13224 + ... + 49852.

Almost surely, 2^1155205402 is an apocalyptic number.

1155205402 is a deficient number, since it is larger than the sum of its proper divisors (712485038).

1155205402 is a wasteful number, since it uses less digits than its factorization.

1155205402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37857.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1155205402 is about 33988.3127265829. The cubic root of 1155205402 is about 1049.2679408235.

The spelling of 1155205402 in words is "one billion, one hundred fifty-five million, two hundred five thousand, four hundred two".