102521045 has 16 divisors (see below), whose sum is σ = 134445312. Its totient is φ = 74429760.

The previous prime is 102521039. The next prime is 102521063. The reversal of 102521045 is 540125201.

It is not a de Polignac number, because 102521045 - 2¹⁰ = 102520021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 39044 + ... + 41586.

It is an arithmetic number, because the mean of its divisors is an integer number (8402832).

Almost surely, 2^102521045 is an apocalyptic number.

It is an amenable number.

102521045 is a deficient number, since it is larger than the sum of its proper divisors (31924267).

102521045 is a wasteful number, since it uses less digits than its factorization.

102521045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292.

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

The square root of 102521045 is about 10125.2676507834. The cubic root of 102521045 is about 468.0271080920.

Adding to 102521045 its reverse (540125201), we get a palindrome (642646246).

The spelling of 102521045 in words is "one hundred two million, five hundred twenty-one thousand, forty-five".