102123705 has 8 divisors (see below), whose sum is σ = 163397952. Its totient is φ = 54465968.

The previous prime is 102123701. The next prime is 102123731. The reversal of 102123705 is 507321201.

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 102123705 - 2² = 102123701 is a prime.

It is a super-2 number, since 2×102123705² = 20858502245854050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102123701) 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, 3404109 + ... + 3404138.

It is an arithmetic number, because the mean of its divisors is an integer number (20424744).

Almost surely, 2^102123705 is an apocalyptic number.

102123705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102123705 is a deficient number, since it is larger than the sum of its proper divisors (61274247).

102123705 is an equidigital number, since it uses as much as digits as its factorization.

102123705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6808255.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 102123705 is about 10105.6273926956. The cubic root of 102123705 is about 467.4216822870.

Adding to 102123705 its reverse (507321201), we get a palindrome (609444906).

The spelling of 102123705 in words is "one hundred two million, one hundred twenty-three thousand, seven hundred five".