102156445 has 16 divisors (see below), whose sum is σ = 132531840. Its totient is φ = 75328704.

The previous prime is 102156443. The next prime is 102156449. The reversal of 102156445 is 544651201.

It is a cyclic number.

It is not a de Polignac number, because 102156445 - 2¹ = 102156443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102156443) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 11017 + ... + 18046.

It is an arithmetic number, because the mean of its divisors is an integer number (8283240).

Almost surely, 2^102156445 is an apocalyptic number.

It is an amenable number.

102156445 is a deficient number, since it is larger than the sum of its proper divisors (30375395).

102156445 is a wasteful number, since it uses less digits than its factorization.

102156445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29124.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 102156445 is about 10107.2471524149. The cubic root of 102156445 is about 467.4716274354.

The spelling of 102156445 in words is "one hundred two million, one hundred fifty-six thousand, four hundred forty-five".