1405800061 has 2 divisors, whose sum is σ = 1405800062. Its totient is φ = 1405800060.

The previous prime is 1405800029. The next prime is 1405800079. The reversal of 1405800061 is 1600085041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1405800036 + 25 = 37494^2 + 5^2 .

It is an emirp because it is prime and its reverse (1600085041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1405800061 - 2⁵ = 1405800029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1405799999 and 1405800035.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405800961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702900030 + 702900031.

It is an arithmetic number, because the mean of its divisors is an integer number (702900031).

Almost surely, 2^1405800061 is an apocalyptic number.

It is an amenable number.

1405800061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405800061 is an equidigital number, since it uses as much as digits as its factorization.

1405800061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1405800061 is about 37494.0003333867. Note that the first 3 decimals coincide. The cubic root of 1405800061 is about 1120.2316859662.

Subtracting from 1405800061 its sum of digits (25), we obtain a square (1405800036 = 37494²).

The spelling of 1405800061 in words is "one billion, four hundred five million, eight hundred thousand, sixty-one".