102451005 has 24 divisors (see below), whose sum is σ = 181916280. Its totient is φ = 53306880.

The previous prime is 102450979. The next prime is 102451007. The reversal of 102451005 is 500154201.

It can be written as a sum of positive squares in 4 ways, for example, as 9771876 + 92679129 = 3126^2 + 9627^2 .

It is not a de Polignac number, because 102451005 - 2⁹ = 102450493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102451007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25920 + ... + 29609.

It is an arithmetic number, because the mean of its divisors is an integer number (7579845).

Almost surely, 2^102451005 is an apocalyptic number.

102451005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102451005 is a deficient number, since it is larger than the sum of its proper divisors (79465275).

102451005 is a wasteful number, since it uses less digits than its factorization.

102451005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55581 (or 55578 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 102451005 is about 10121.8083858567. The cubic root of 102451005 is about 467.9205020566.

The spelling of 102451005 in words is "one hundred two million, four hundred fifty-one thousand, five".