139564 has 24 divisors (see below), whose sum is σ = 268128. Its totient is φ = 63360.

The previous prime is 139547. The next prime is 139571. The reversal of 139564 is 465931.

It is a super-2 number, since 2×139564² = 38956220192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3384 + ... + 3424.

It is an arithmetic number, because the mean of its divisors is an integer number (11172).

2¹³⁹⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

139564 is a deficient number, since it is larger than the sum of its proper divisors (128564).

139564 is a wasteful number, since it uses less digits than its factorization.

139564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 103 counting only the distinct ones).

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

The square root of 139564 is about 373.5826548436. The cubic root of 139564 is about 51.8709819310.

It can be divided in two parts, 139 and 564, that added together give a triangular number (703 = T₃₇).

The spelling of 139564 in words is "one hundred thirty-nine thousand, five hundred sixty-four".