1405751 has 2 divisors, whose sum is σ = 1405752. Its totient is φ = 1405750.

The previous prime is 1405721. The next prime is 1405759. The reversal of 1405751 is 1575041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405751 is a prime.

It is a super-3 number, since 3×1405751³ = 8333864943038339253, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702875 + 702876.

It is an arithmetic number, because the mean of its divisors is an integer number (702876).

2^1405751 is an apocalyptic number.

1405751 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405751 is an equidigital number, since it uses as much as digits as its factorization.

1405751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 1405751 is about 1185.6437070216. The cubic root of 1405751 is about 112.0218654164.

The spelling of 1405751 in words is "one million, four hundred five thousand, seven hundred fifty-one".