245170729 has 4 divisors (see below), whose sum is σ = 246732484. Its totient is φ = 243608976.

The previous prime is 245170711. The next prime is 245170759. The reversal of 245170729 is 927071542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 140067225 + 105103504 = 11835^2 + 10252^2 .

It is a cyclic number.

It is not a de Polignac number, because 245170729 - 2¹⁵ = 245137961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245170759) 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, 780642 + ... + 780955.

It is an arithmetic number, because the mean of its divisors is an integer number (61683121).

Almost surely, 2^245170729 is an apocalyptic number.

It is an amenable number.

245170729 is a deficient number, since it is larger than the sum of its proper divisors (1561755).

245170729 is a wasteful number, since it uses less digits than its factorization.

245170729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561754.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 245170729 is about 15657.9286305692. The cubic root of 245170729 is about 625.8777886821.

The spelling of 245170729 in words is "two hundred forty-five million, one hundred seventy thousand, seven hundred twenty-nine".