245405051 has 4 divisors (see below), whose sum is σ = 247278504. Its totient is φ = 243531600.

The previous prime is 245405029. The next prime is 245405057. The reversal of 245405051 is 150504542.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245405051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245405051.

It is not an unprimeable number, because it can be changed into a prime (245405057) 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, 936530 + ... + 936791.

It is an arithmetic number, because the mean of its divisors is an integer number (61819626).

Almost surely, 2^245405051 is an apocalyptic number.

245405051 is a deficient number, since it is larger than the sum of its proper divisors (1873453).

245405051 is a wasteful number, since it uses less digits than its factorization.

245405051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873452.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 245405051 is about 15665.4093786278. The cubic root of 245405051 is about 626.0771194887.

Adding to 245405051 its reverse (150504542), we get a palindrome (395909593).

The spelling of 245405051 in words is "two hundred forty-five million, four hundred five thousand, fifty-one".