1405634 has 4 divisors (see below), whose sum is σ = 2108454. Its totient is φ = 702816.

The previous prime is 1405631. The next prime is 1405637. The reversal of 1405634 is 4365041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4365041 = 19 ⋅229739.

It is an interprime number because it is at equal distance from previous prime (1405631) and next prime (1405637).

It can be written as a sum of positive squares in only one way, i.e., 1243225 + 162409 = 1115^2 + 403^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351407 + ... + 351410.

2^1405634 is an apocalyptic number.

1405634 is a deficient number, since it is larger than the sum of its proper divisors (702820).

1405634 is an equidigital number, since it uses as much as digits as its factorization.

1405634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702819.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1405634 is about 1185.5943657086. The cubic root of 1405634 is about 112.0187574876.

The spelling of 1405634 in words is "one million, four hundred five thousand, six hundred thirty-four".