102539401 has 4 divisors (see below), whose sum is σ = 105040404. Its totient is φ = 100038400.

The previous prime is 102539399. The next prime is 102539417. The reversal of 102539401 is 104935201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34047225 + 68492176 = 5835^2 + 8276^2 .

It is a cyclic number.

It is not a de Polignac number, because 102539401 - 2¹ = 102539399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102530401) 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, 1250440 + ... + 1250521.

It is an arithmetic number, because the mean of its divisors is an integer number (26260101).

Almost surely, 2^102539401 is an apocalyptic number.

It is an amenable number.

102539401 is a deficient number, since it is larger than the sum of its proper divisors (2501003).

102539401 is an equidigital number, since it uses as much as digits as its factorization.

102539401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501002.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 102539401 is about 10126.1740553874. The cubic root of 102539401 is about 468.0550392448.

It can be divided in two parts, 1025 and 39401, that multiplied together give a square (40386025 = 6355²).

The spelling of 102539401 in words is "one hundred two million, five hundred thirty-nine thousand, four hundred one".