1156215345 has 16 divisors (see below), whose sum is σ = 1850453952. Its totient is φ = 616478400.

The previous prime is 1156215343. The next prime is 1156215349. The reversal of 1156215345 is 5435126511.

It is not a de Polignac number, because 1156215345 - 2¹ = 1156215343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1156215343) 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, 61479 + ... + 78051.

It is an arithmetic number, because the mean of its divisors is an integer number (115653372).

Almost surely, 2^1156215345 is an apocalyptic number.

1156215345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1156215345 is a deficient number, since it is larger than the sum of its proper divisors (694238607).

1156215345 is a wasteful number, since it uses less digits than its factorization.

1156215345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21232.

The product of its digits is 18000, while the sum is 33.

The square root of 1156215345 is about 34003.1666907657. The cubic root of 1156215345 is about 1049.5736273401.

The spelling of 1156215345 in words is "one billion, one hundred fifty-six million, two hundred fifteen thousand, three hundred forty-five".