1361024561 has 16 divisors (see below), whose sum is σ = 1520520960. Its totient is φ = 1210135680.

The previous prime is 1361024551. The next prime is 1361024603. The reversal of 1361024561 is 1654201631.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1361024561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1361024521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25946 + ... + 58268.

It is an arithmetic number, because the mean of its divisors is an integer number (95032560).

Almost surely, 2^1361024561 is an apocalyptic number.

It is an amenable number.

1361024561 is a deficient number, since it is larger than the sum of its proper divisors (159496399).

1361024561 is a wasteful number, since it uses less digits than its factorization.

1361024561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32456.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1361024561 is about 36892.0663693429. The cubic root of 1361024561 is about 1108.2098029747.

The spelling of 1361024561 in words is "one billion, three hundred sixty-one million, twenty-four thousand, five hundred sixty-one".