139654 has 4 divisors (see below), whose sum is σ = 209484. Its totient is φ = 69826.

The previous prime is 139627. The next prime is 139661. The reversal of 139654 is 456931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 456931 = 19 ⋅24049.

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 3⁷ + 6² + 9⁵ + 5⁷ + 4⁴ .

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34912 + ... + 34915.

It is an arithmetic number, because the mean of its divisors is an integer number (52371).

2¹³⁹⁶⁵⁴ is an apocalyptic number.

139654 is a deficient number, since it is larger than the sum of its proper divisors (69830).

139654 is an equidigital number, since it uses as much as digits as its factorization.

139654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69829.

The product of its digits is 3240, while the sum is 28.

The square root of 139654 is about 373.7030907017. The cubic root of 139654 is about 51.8821294696.

The spelling of 139654 in words is "one hundred thirty-nine thousand, six hundred fifty-four".