1561262204 has 12 divisors (see below), whose sum is σ = 2765127624. Its totient is φ = 771225744.

The previous prime is 1561262191. The next prime is 1561262251. The reversal of 1561262204 is 4022621651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2350967 + ... + 2351630.

It is an arithmetic number, because the mean of its divisors is an integer number (230427302).

Almost surely, 2^1561262204 is an apocalyptic number.

It is an amenable number.

1561262204 is a deficient number, since it is larger than the sum of its proper divisors (1203865420).

1561262204 is a wasteful number, since it uses less digits than its factorization.

1561262204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4702684 (or 4702682 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1561262204 is about 39512.8106314901. The cubic root of 1561262204 is about 1160.0907093156.

Adding to 1561262204 its reverse (4022621651), we get a palindrome (5583883855).

The spelling of 1561262204 in words is "one billion, five hundred sixty-one million, two hundred sixty-two thousand, two hundred four".