1155121435 has 32 divisors (see below), whose sum is σ = 1578265920. Its totient is φ = 804556800.

The previous prime is 1155121421. The next prime is 1155121441. The reversal of 1155121435 is 5341215511.

It is not a de Polignac number, because 1155121435 - 2⁵ = 1155121403 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295695 + ... + 299575.

It is an arithmetic number, because the mean of its divisors is an integer number (49320810).

Almost surely, 2^1155121435 is an apocalyptic number.

1155121435 is a deficient number, since it is larger than the sum of its proper divisors (423144485).

1155121435 is a wasteful number, since it uses less digits than its factorization.

1155121435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159.

The product of its digits is 3000, while the sum is 28.

The square root of 1155121435 is about 33987.0774707094. The cubic root of 1155121435 is about 1049.2425179230.

Adding to 1155121435 its reverse (5341215511), we get a palindrome (6496336946).

The spelling of 1155121435 in words is "one billion, one hundred fifty-five million, one hundred twenty-one thousand, four hundred thirty-five".