1623855242 has 4 divisors (see below), whose sum is σ = 2435782866. Its totient is φ = 811927620.

The previous prime is 1623855241. The next prime is 1623855253. The reversal of 1623855242 is 2425583261.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1298088841 + 325766401 = 36029^2 + 18049^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1623855196 and 1623855205.

It is not an unprimeable number, because it can be changed into a prime (1623855241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405963809 + ... + 405963812.

Almost surely, 2^1623855242 is an apocalyptic number.

1623855242 is a deficient number, since it is larger than the sum of its proper divisors (811927624).

1623855242 is an equidigital number, since it uses as much as digits as its factorization.

1623855242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811927623.

The product of its digits is 115200, while the sum is 38.

The square root of 1623855242 is about 40297.0872644662. The cubic root of 1623855242 is about 1175.3912062691.

The spelling of 1623855242 in words is "one billion, six hundred twenty-three million, eight hundred fifty-five thousand, two hundred forty-two".