1561032741 has 16 divisors (see below), whose sum is σ = 2136273920. Its totient is φ = 1013387760.

The previous prime is 1561032721. The next prime is 1561032749. The reversal of 1561032741 is 1472301651.

It is not a de Polignac number, because 1561032741 - 2¹⁴ = 1561016357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1561032699 and 1561032708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561032749) 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, 24420 + ... + 60978.

It is an arithmetic number, because the mean of its divisors is an integer number (133517120).

Almost surely, 2^1561032741 is an apocalyptic number.

It is an amenable number.

1561032741 is a deficient number, since it is larger than the sum of its proper divisors (575241179).

1561032741 is a wasteful number, since it uses less digits than its factorization.

1561032741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36936.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1561032741 is about 39509.9068715683. The cubic root of 1561032741 is about 1160.0338726237.

The spelling of 1561032741 in words is "one billion, five hundred sixty-one million, thirty-two thousand, seven hundred forty-one".