1780125047 has 16 divisors (see below), whose sum is σ = 1840430592. Its totient is φ = 1720871040.

The previous prime is 1780125037. The next prime is 1780125079. The reversal of 1780125047 is 7405210871.

It is a cyclic number.

It is not a de Polignac number, because 1780125047 - 2⁴ = 1780125031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1780124998 and 1780125016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1780125037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3032288 + ... + 3032874.

It is an arithmetic number, because the mean of its divisors is an integer number (115026912).

Almost surely, 2^1780125047 is an apocalyptic number.

1780125047 is a deficient number, since it is larger than the sum of its proper divisors (60305545).

1780125047 is a wasteful number, since it uses less digits than its factorization.

1780125047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 1780125047 is about 42191.5281425075. The cubic root of 1780125047 is about 1211.9466529817.

The spelling of 1780125047 in words is "one billion, seven hundred eighty million, one hundred twenty-five thousand, forty-seven".