102152405 has 8 divisors (see below), whose sum is σ = 129793752. Its totient is φ = 76914688.

The previous prime is 102152387. The next prime is 102152411. The reversal of 102152405 is 504251201.

It can be written as a sum of positive squares in 4 ways, for example, as 34023889 + 68128516 = 5833^2 + 8254^2 .

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 102152405 - 2²⁰ = 101103829 is a prime.

It is a super-2 number, since 2×102152405² = 20870227694568050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600812 + ... + 600981.

It is an arithmetic number, because the mean of its divisors is an integer number (16224219).

Almost surely, 2^102152405 is an apocalyptic number.

It is an amenable number.

102152405 is a deficient number, since it is larger than the sum of its proper divisors (27641347).

102152405 is a wasteful number, since it uses less digits than its factorization.

102152405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201815.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 102152405 is about 10107.0472938440. The cubic root of 102152405 is about 467.4654649582.

The spelling of 102152405 in words is "one hundred two million, one hundred fifty-two thousand, four hundred five".