1152213785 has 8 divisors (see below), whose sum is σ = 1386365640. Its totient is φ = 919298304.

The previous prime is 1152213779. The next prime is 1152213791. The reversal of 1152213785 is 5873122511.

It is an interprime number because it is at equal distance from previous prime (1152213779) and next prime (1152213791).

It can be written as a sum of positive squares in 4 ways, for example, as 380874256 + 771339529 = 19516^2 + 27773^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1152213785 - 2¹² = 1152209689 is a prime.

It is a super-6 number, since 6×1152213785⁶ (a number of 56 digits) contains 666666 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307040 + ... + 310769.

It is an arithmetic number, because the mean of its divisors is an integer number (173295705).

Almost surely, 2^1152213785 is an apocalyptic number.

It is an amenable number.

1152213785 is a deficient number, since it is larger than the sum of its proper divisors (234151855).

1152213785 is an equidigital number, since it uses as much as digits as its factorization.

1152213785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618187.

The product of its digits is 16800, while the sum is 35.

The square root of 1152213785 is about 33944.2747013395. The cubic root of 1152213785 is about 1048.3614003392.

The spelling of 1152213785 in words is "one billion, one hundred fifty-two million, two hundred thirteen thousand, seven hundred eighty-five".