1420531 has 4 divisors (see below), whose sum is σ = 1623472. Its totient is φ = 1217592.

The previous prime is 1420519. The next prime is 1420561. The reversal of 1420531 is 1350241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1350241 = 37 ⋅36493.

It is a cyclic number.

It is not a de Polignac number, because 1420531 - 2⁷ = 1420403 is a prime.

It is a super-2 number, since 2×1420531² = 4035816643922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420501) 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 in 3 ways as a sum of consecutive naturals, for example, 101460 + ... + 101473.

It is an arithmetic number, because the mean of its divisors is an integer number (405868).

2^1420531 is an apocalyptic number.

1420531 is a deficient number, since it is larger than the sum of its proper divisors (202941).

1420531 is an equidigital number, since it uses as much as digits as its factorization.

1420531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202940.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1420531 is about 1191.8603106069. The cubic root of 1420531 is about 112.4130950241.

Adding to 1420531 its reverse (1350241), we get a palindrome (2770772).

The spelling of 1420531 in words is "one million, four hundred twenty thousand, five hundred thirty-one".