252123406 has 4 divisors (see below), whose sum is σ = 378185112. Its totient is φ = 126061702.

The previous prime is 252123397. The next prime is 252123437. The reversal of 252123406 is 604321252.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63030850 + ... + 63030853.

It is an arithmetic number, because the mean of its divisors is an integer number (94546278).

Almost surely, 2^252123406 is an apocalyptic number.

252123406 is a deficient number, since it is larger than the sum of its proper divisors (126061706).

252123406 is a wasteful number, since it uses less digits than its factorization.

252123406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126061705.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 252123406 is about 15878.3943142876. The cubic root of 252123406 is about 631.7390483197.

Adding to 252123406 its reverse (604321252), we get a palindrome (856444658).

The spelling of 252123406 in words is "two hundred fifty-two million, one hundred twenty-three thousand, four hundred six".