1405261 has 16 divisors (see below), whose sum is σ = 1709568. Its totient is φ = 1137600.

The previous prime is 1405249. The next prime is 1405267. The reversal of 1405261 is 1625041.

It is a cyclic number.

It is not a de Polignac number, because 1405261 - 2⁷ = 1405133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4275 + ... + 4591.

It is an arithmetic number, because the mean of its divisors is an integer number (106848).

2^1405261 is an apocalyptic number.

1405261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1405261 is the 634-th nonagonal number.

It is an amenable number.

1405261 is a deficient number, since it is larger than the sum of its proper divisors (304307).

1405261 is a wasteful number, since it uses less digits than its factorization.

1405261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1405261 is about 1185.4370502055. The cubic root of 1405261 is about 112.0088481530.

The spelling of 1405261 in words is "one million, four hundred five thousand, two hundred sixty-one".