139461 has 16 divisors (see below), whose sum is σ = 220800. Its totient is φ = 76608.

The previous prime is 139459. The next prime is 139483. The reversal of 139461 is 164931.

It is not a de Polignac number, because 139461 - 2¹ = 139459 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139461.

It is not an unprimeable number, because it can be changed into a prime (139361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495 + ... + 723.

It is an arithmetic number, because the mean of its divisors is an integer number (13800).

2¹³⁹⁴⁶¹ is an apocalyptic number.

It is an amenable number.

139461 is a deficient number, since it is larger than the sum of its proper divisors (81339).

139461 is a wasteful number, since it uses less digits than its factorization.

139461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268.

The product of its digits is 648, while the sum is 24.

The square root of 139461 is about 373.4447750337. Note that the first 3 decimals coincide. The cubic root of 139461 is about 51.8582183100.

The spelling of 139461 in words is "one hundred thirty-nine thousand, four hundred sixty-one".