1405450 has 12 divisors (see below), whose sum is σ = 2614230. Its totient is φ = 562160.

The previous prime is 1405421. The next prime is 1405451. The reversal of 1405450 is 545041.

It can be written as a sum of positive squares in 3 ways, for example, as 546121 + 859329 = 739^2 + 927^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1405451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14005 + ... + 14104.

2^1405450 is an apocalyptic number.

1405450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1405450 is a deficient number, since it is larger than the sum of its proper divisors (1208780).

1405450 is a wasteful number, since it uses less digits than its factorization.

1405450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28121 (or 28116 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1405450 is about 1185.5167649595. The cubic root of 1405450 is about 112.0138694559.

It can be divided in two parts, 1405 and 450, that multiplied together give a triangular number (632250 = T₁₁₂₄).

The spelling of 1405450 in words is "one million, four hundred five thousand, four hundred fifty".