1161236530 has 8 divisors (see below), whose sum is σ = 2090225772. Its totient is φ = 464494608.

The previous prime is 1161236521. The next prime is 1161236537. The reversal of 1161236530 is 356321611.

It can be written as a sum of positive squares in 2 ways, for example, as 1072104049 + 89132481 = 32743^2 + 9441^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1161236537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58061817 + ... + 58061836.

Almost surely, 2^1161236530 is an apocalyptic number.

1161236530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161236530 is a deficient number, since it is larger than the sum of its proper divisors (928989242).

1161236530 is a wasteful number, since it uses less digits than its factorization.

1161236530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116123660.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1161236530 is about 34076.9207822538. The cubic root of 1161236530 is about 1051.0907878383.

It can be divided in two parts, 1161 and 236530, that multiplied together give a triangular number (274611330 = T₂₃₄₃₅).

The spelling of 1161236530 in words is "one billion, one hundred sixty-one million, two hundred thirty-six thousand, five hundred thirty".