1420005 has 16 divisors (see below), whose sum is σ = 2291904. Its totient is φ = 750720.

The previous prime is 1419973. The next prime is 1420009. The reversal of 1420005 is 5000241.

It is not a de Polignac number, because 1420005 - 2⁵ = 1419973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1710 + ... + 2400.

It is an arithmetic number, because the mean of its divisors is an integer number (143244).

2^1420005 is an apocalyptic number.

1420005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1420005 is a deficient number, since it is larger than the sum of its proper divisors (871899).

1420005 is a wasteful number, since it uses less digits than its factorization.

1420005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 1420005 is about 1191.6396267328. The cubic root of 1420005 is about 112.3992183851.

Adding to 1420005 its reverse (5000241), we get a palindrome (6420246).

The spelling of 1420005 in words is "one million, four hundred twenty thousand, five".