245121406 has 8 divisors (see below), whose sum is σ = 368230464. Its totient is φ = 122377920.

The previous prime is 245121389. The next prime is 245121407. The reversal of 245121406 is 604121542.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245121407) 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, 89710 + ... + 92401.

It is an arithmetic number, because the mean of its divisors is an integer number (46028808).

Almost surely, 2^245121406 is an apocalyptic number.

245121406 is a deficient number, since it is larger than the sum of its proper divisors (123109058).

245121406 is a wasteful number, since it uses less digits than its factorization.

245121406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182786.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 245121406 is about 15656.3535345878. The cubic root of 245121406 is about 625.8358148833.

Adding to 245121406 its reverse (604121542), we get a palindrome (849242948).

The spelling of 245121406 in words is "two hundred forty-five million, one hundred twenty-one thousand, four hundred six".