102720361 has 4 divisors (see below), whose sum is σ = 102754432. Its totient is φ = 102686292.

The previous prime is 102720337. The next prime is 102720367. The reversal of 102720361 is 163027201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102720361 - 2²¹ = 100623209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102720367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12021 + ... + 18706.

It is an arithmetic number, because the mean of its divisors is an integer number (25688608).

Almost surely, 2^102720361 is an apocalyptic number.

It is an amenable number.

102720361 is a deficient number, since it is larger than the sum of its proper divisors (34071).

102720361 is an equidigital number, since it uses as much as digits as its factorization.

102720361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34070.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 102720361 is about 10135.1053768572. The cubic root of 102720361 is about 468.3302162745.

Adding to 102720361 its reverse (163027201), we get a palindrome (265747562).

The spelling of 102720361 in words is "one hundred two million, seven hundred twenty thousand, three hundred sixty-one".