102521287 has 8 divisors (see below), whose sum is σ = 112198032. Its totient is φ = 92904000.

The previous prime is 102521261. The next prime is 102521303. The reversal of 102521287 is 782125201.

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 102521287 - 2¹¹ = 102519239 is a prime.

It is a super-2 number, since 2×102521287² = 21021228576272738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102521227) 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, 11214 + ... + 18187.

It is an arithmetic number, because the mean of its divisors is an integer number (14024754).

Almost surely, 2^102521287 is an apocalyptic number.

102521287 is a deficient number, since it is larger than the sum of its proper divisors (9676745).

102521287 is a wasteful number, since it uses less digits than its factorization.

102521287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29729.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 102521287 is about 10125.2796010777. The cubic root of 102521287 is about 468.0274763497.

Adding to 102521287 its reverse (782125201), we get a palindrome (884646488).

The spelling of 102521287 in words is "one hundred two million, five hundred twenty-one thousand, two hundred eighty-seven".