1156215434 has 32 divisors (see below), whose sum is σ = 1910900160. Its totient is φ = 520329600.

The previous prime is 1156215409. The next prime is 1156215439. The reversal of 1156215434 is 4345126511.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1156215434.

It is not an unprimeable number, because it can be changed into a prime (1156215439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1081052 + ... + 1082120.

It is an arithmetic number, because the mean of its divisors is an integer number (59715630).

Almost surely, 2^1156215434 is an apocalyptic number.

1156215434 is a deficient number, since it is larger than the sum of its proper divisors (754684726).

1156215434 is a wasteful number, since it uses less digits than its factorization.

1156215434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526.

The product of its digits is 14400, while the sum is 32.

The square root of 1156215434 is about 34003.1679994673. The cubic root of 1156215434 is about 1049.5736542706.

The spelling of 1156215434 in words is "one billion, one hundred fifty-six million, two hundred fifteen thousand, four hundred thirty-four".