102406215 has 16 divisors (see below), whose sum is σ = 173488608. Its totient is φ = 51403776.

The previous prime is 102406141. The next prime is 102406247. The reversal of 102406215 is 512604201.

It is not a de Polignac number, because 102406215 - 2⁹ = 102405703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102406191 and 102406200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200542 + ... + 201051.

It is an arithmetic number, because the mean of its divisors is an integer number (10843038).

Almost surely, 2^102406215 is an apocalyptic number.

102406215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102406215 is a deficient number, since it is larger than the sum of its proper divisors (71082393).

102406215 is a wasteful number, since it uses less digits than its factorization.

102406215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401618.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 102406215 is about 10119.5955946866. The cubic root of 102406215 is about 467.8523029071.

The spelling of 102406215 in words is "one hundred two million, four hundred six thousand, two hundred fifteen".