212605123 has 8 divisors (see below), whose sum is σ = 222002208. Its totient is φ = 203220864.

The previous prime is 212605121. The next prime is 212605157. The reversal of 212605123 is 321506212.

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

It is a cyclic number.

It is not a de Polignac number, because 212605123 - 2¹ = 212605121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212605094 and 212605103.

It is not an unprimeable number, because it can be changed into a prime (212605121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48811 + ... + 52987.

It is an arithmetic number, because the mean of its divisors is an integer number (27750276).

Almost surely, 2^212605123 is an apocalyptic number.

212605123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212605123 is a deficient number, since it is larger than the sum of its proper divisors (9397085).

212605123 is a wasteful number, since it uses less digits than its factorization.

212605123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6413.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 212605123 is about 14580.9849804463. The cubic root of 212605123 is about 596.8399817289.

The spelling of 212605123 in words is "two hundred twelve million, six hundred five thousand, one hundred twenty-three".