129454742 has 4 divisors (see below), whose sum is σ = 194182116. Its totient is φ = 64727370.

The previous prime is 129454739. The next prime is 129454747. The reversal of 129454742 is 247454921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247454921 = 7 ⋅35350703.

It is a junction number, because it is equal to n+sod(n) for n = 129454696 and 129454705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129454747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32363684 + ... + 32363687.

It is an arithmetic number, because the mean of its divisors is an integer number (48545529).

Almost surely, 2^129454742 is an apocalyptic number.

129454742 is a deficient number, since it is larger than the sum of its proper divisors (64727374).

129454742 is an equidigital number, since it uses as much as digits as its factorization.

129454742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64727373.

The product of its digits is 80640, while the sum is 38.

The square root of 129454742 is about 11377.8179806147. The cubic root of 129454742 is about 505.8704616146.

The spelling of 129454742 in words is "one hundred twenty-nine million, four hundred fifty-four thousand, seven hundred forty-two".