102407581 has 2 divisors, whose sum is σ = 102407582. Its totient is φ = 102407580.

The previous prime is 102407579. The next prime is 102407603. The reversal of 102407581 is 185704201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93799225 + 8608356 = 9685^2 + 2934^2 .

It is a cyclic number.

It is not a de Polignac number, because 102407581 - 2¹ = 102407579 is a prime.

It is a super-2 number, since 2×102407581² = 20974625292543122, which contains 22 as substring.

Together with 102407579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102407281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51203790 + 51203791.

It is an arithmetic number, because the mean of its divisors is an integer number (51203791).

Almost surely, 2^102407581 is an apocalyptic number.

It is an amenable number.

102407581 is a deficient number, since it is larger than the sum of its proper divisors (1).

102407581 is an equidigital number, since it uses as much as digits as its factorization.

102407581 is an odious number, because the sum of its binary digits is odd.

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

The square root of 102407581 is about 10119.6630872772. The cubic root of 102407581 is about 467.8543831304.

The spelling of 102407581 in words is "one hundred two million, four hundred seven thousand, five hundred eighty-one".