245306129 has 4 divisors (see below), whose sum is σ = 249463920. Its totient is φ = 241148340.

The previous prime is 245306119. The next prime is 245306143. The reversal of 245306129 is 921603542.

It is a happy number.

245306129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-245306129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 245306095 and 245306104.

It is not an unprimeable number, because it can be changed into a prime (245306119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078807 + ... + 2078924.

It is an arithmetic number, because the mean of its divisors is an integer number (62365980).

Almost surely, 2^245306129 is an apocalyptic number.

It is an amenable number.

245306129 is a deficient number, since it is larger than the sum of its proper divisors (4157791).

245306129 is an equidigital number, since it uses as much as digits as its factorization.

245306129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157790.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 245306129 is about 15662.2517218949. The cubic root of 245306129 is about 625.9929849473.

The spelling of 245306129 in words is "two hundred forty-five million, three hundred six thousand, one hundred twenty-nine".