1561135234 has 8 divisors (see below), whose sum is σ = 2346718608. Its totient is φ = 778895700.

The previous prime is 1561135223. The next prime is 1561135267. The reversal of 1561135234 is 4325311651.

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

It is a junction number, because it is equal to n+sod(n) for n = 1561135196 and 1561135205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834792 + ... + 836659.

It is an arithmetic number, because the mean of its divisors is an integer number (293339826).

Almost surely, 2^1561135234 is an apocalyptic number.

1561135234 is a deficient number, since it is larger than the sum of its proper divisors (785583374).

1561135234 is a wasteful number, since it uses less digits than its factorization.

1561135234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671920.

The product of its digits is 10800, while the sum is 31.

The square root of 1561135234 is about 39511.2039047154. The cubic root of 1561135234 is about 1160.0592602504.

Adding to 1561135234 its reverse (4325311651), we get a palindrome (5886446885).

The spelling of 1561135234 in words is "one billion, five hundred sixty-one million, one hundred thirty-five thousand, two hundred thirty-four".