245042554 has 4 divisors (see below), whose sum is σ = 367563834. Its totient is φ = 122521276.

The previous prime is 245042533. The next prime is 245042557. The reversal of 245042554 is 455240542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455240542 = 2 ⋅227620271.

It can be written as a sum of positive squares in only one way, i.e., 233325625 + 11716929 = 15275^2 + 3423^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (245042557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61260637 + ... + 61260640.

Almost surely, 2^245042554 is an apocalyptic number.

245042554 is a deficient number, since it is larger than the sum of its proper divisors (122521280).

245042554 is a wasteful number, since it uses less digits than its factorization.

245042554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122521279.

The product of its (nonzero) digits is 32000, while the sum is 31.

The square root of 245042554 is about 15653.8351211452. The cubic root of 245042554 is about 625.7687002523.

The spelling of 245042554 in words is "two hundred forty-five million, forty-two thousand, five hundred fifty-four".