139545287 has 6 divisors (see below), whose sum is σ = 162328248. Its totient is φ = 119610204.

The previous prime is 139545283. The next prime is 139545293. The reversal of 139545287 is 782545931.

It is not a de Polignac number, because 139545287 - 2² = 139545283 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 (139545283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1423883 + ... + 1423980.

It is an arithmetic number, because the mean of its divisors is an integer number (27054708).

Almost surely, 2^139545287 is an apocalyptic number.

139545287 is a deficient number, since it is larger than the sum of its proper divisors (22782961).

139545287 is an equidigital number, since it uses as much as digits as its factorization.

139545287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847877 (or 2847870 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The square root of 139545287 is about 11812.9288070317. The cubic root of 139545287 is about 518.6866350822.

The spelling of 139545287 in words is "one hundred thirty-nine million, five hundred forty-five thousand, two hundred eighty-seven".