129754 has 4 divisors (see below), whose sum is σ = 194634. Its totient is φ = 64876.

The previous prime is 129749. The next prime is 129757. The reversal of 129754 is 457921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 457921 = 47 ⋅9743.

It can be written as a sum of positive squares in only one way, i.e., 74529 + 55225 = 273^2 + 235^2 .

It is a super-2 number, since 2×129754² = 33672201032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32437 + ... + 32440.

2¹²⁹⁷⁵⁴ is an apocalyptic number.

129754 is a deficient number, since it is larger than the sum of its proper divisors (64880).

129754 is an equidigital number, since it uses as much as digits as its factorization.

129754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64879.

The product of its digits is 2520, while the sum is 28.

The square root of 129754 is about 360.2138253871. The cubic root of 129754 is about 50.6259965256.

The spelling of 129754 in words is "one hundred twenty-nine thousand, seven hundred fifty-four".