561121252 has 12 divisors (see below), whose sum is σ = 987051436. Its totient is φ = 279106560.

The previous prime is 561121217. The next prime is 561121273. The reversal of 561121252 is 252121165.

It can be written as a sum of positive squares in 2 ways, for example, as 158155776 + 402965476 = 12576^2 + 20074^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362649 + ... + 364192.

Almost surely, 2^561121252 is an apocalyptic number.

It is an amenable number.

561121252 is a deficient number, since it is larger than the sum of its proper divisors (425930184).

561121252 is a wasteful number, since it uses less digits than its factorization.

561121252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727038 (or 727036 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 561121252 is about 23687.9980580884. The cubic root of 561121252 is about 824.8068121880.

The spelling of 561121252 in words is "five hundred sixty-one million, one hundred twenty-one thousand, two hundred fifty-two".