120669 has 16 divisors (see below), whose sum is σ = 177600. Its totient is φ = 72576.

The previous prime is 120661. The next prime is 120671. The reversal of 120669 is 966021.

120669 = T₁₇ + T₁₈ + ... + T₈₉.

120669 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 120669 - 2³ = 120661 is a prime.

It is a super-2 number, since 2×120669² = 29122015122, which contains 22 as substring.

120669 is an undulating number in base 8.

120669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120661) 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, 1617 + ... + 1689.

It is an arithmetic number, because the mean of its divisors is an integer number (11100).

2¹²⁰⁶⁶⁹ is an apocalyptic number.

120669 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

120669 is a deficient number, since it is larger than the sum of its proper divisors (56931).

120669 is a wasteful number, since it uses less digits than its factorization.

120669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124.

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

The square root of 120669 is about 347.3744377469. The cubic root of 120669 is about 49.4157325578.

Subtracting from 120669 its product of nonzero digits (648), we obtain a palindrome (120021).

It can be divided in two parts, 1206 and 69, that added together give a triangular number (1275 = T₅₀).

The spelling of 120669 in words is "one hundred twenty thousand, six hundred sixty-nine".