102521407 has 8 divisors (see below), whose sum is σ = 109118016. Its totient is φ = 95987712.

The previous prime is 102521389. The next prime is 102521411. The reversal of 102521407 is 704125201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102521407 - 2²³ = 94132799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102525407) 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, 12343 + ... + 18904.

It is an arithmetic number, because the mean of its divisors is an integer number (13639752).

Almost surely, 2^102521407 is an apocalyptic number.

102521407 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

102521407 is a deficient number, since it is larger than the sum of its proper divisors (6596609).

102521407 is a wasteful number, since it uses less digits than its factorization.

102521407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31457.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 102521407 is about 10125.2855268382. The cubic root of 102521407 is about 468.0276589565.

Adding to 102521407 its reverse (704125201), we get a palindrome (806646608).

The spelling of 102521407 in words is "one hundred two million, five hundred twenty-one thousand, four hundred seven".