245740545 has 12 divisors (see below), whose sum is σ = 425950356. Its totient is φ = 131061600.

The previous prime is 245740543. The next prime is 245740549. The reversal of 245740545 is 545047542.

It is a happy number.

245740545 is a `hidden beast` number, since 2 + 45 + 74 + 0 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 176384961 + 69355584 = 13281^2 + 8328^2 .

It is not a de Polignac number, because 245740545 - 2¹ = 245740543 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245740543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2730406 + ... + 2730495.

It is an arithmetic number, because the mean of its divisors is an integer number (35495863).

Almost surely, 2^245740545 is an apocalyptic number.

It is an amenable number.

245740545 is a deficient number, since it is larger than the sum of its proper divisors (180209811).

245740545 is a wasteful number, since it uses less digits than its factorization.

245740545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460912 (or 5460909 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 36.

The square root of 245740545 is about 15676.1138360245. The cubic root of 245740545 is about 626.3622935593.

The spelling of 245740545 in words is "two hundred forty-five million, seven hundred forty thousand, five hundred forty-five".