123020434 has 4 divisors (see below), whose sum is σ = 184530654. Its totient is φ = 61510216.

The previous prime is 123020423. The next prime is 123020441. The reversal of 123020434 is 434020321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 107060409 + 15960025 = 10347^2 + 3995^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30755107 + ... + 30755110.

Almost surely, 2^123020434 is an apocalyptic number.

123020434 is a deficient number, since it is larger than the sum of its proper divisors (61510220).

123020434 is an equidigital number, since it uses as much as digits as its factorization.

123020434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61510219.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 123020434 is about 11091.4577040171. The cubic root of 123020434 is about 497.3465216830.

Adding to 123020434 its reverse (434020321), we get a palindrome (557040755).

The spelling of 123020434 in words is "one hundred twenty-three million, twenty thousand, four hundred thirty-four".