123561434 has 8 divisors (see below), whose sum is σ = 185518740. Its totient is φ = 61721856.

The previous prime is 123561433. The next prime is 123561437. The reversal of 123561434 is 434165321.

It can be written as a sum of positive squares in 2 ways, for example, as 122036209 + 1525225 = 11047^2 + 1235^2 .

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 = 123561397 and 123561406.

It is not an unprimeable number, because it can be changed into a prime (123561433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26759 + ... + 31034.

Almost surely, 2^123561434 is an apocalyptic number.

123561434 is a deficient number, since it is larger than the sum of its proper divisors (61957306).

123561434 is a wasteful number, since it uses less digits than its factorization.

123561434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58864.

The product of its digits is 8640, while the sum is 29.

The square root of 123561434 is about 11115.8190881284. The cubic root of 123561434 is about 498.0745064677.

The spelling of 123561434 in words is "one hundred twenty-three million, five hundred sixty-one thousand, four hundred thirty-four".