1345531 has 4 divisors (see below), whose sum is σ = 1467864. Its totient is φ = 1223200.

The previous prime is 1345507. The next prime is 1345537. The reversal of 1345531 is 1355431.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1345531 - 2¹⁷ = 1214459 is a prime.

It is a super-2 number, since 2×1345531² = 3620907343922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345537) 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, 61150 + ... + 61171.

It is an arithmetic number, because the mean of its divisors is an integer number (366966).

2^1345531 is an apocalyptic number.

1345531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1345531 is a deficient number, since it is larger than the sum of its proper divisors (122333).

1345531 is a wasteful number, since it uses less digits than its factorization.

1345531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122332.

The product of its digits is 900, while the sum is 22.

The square root of 1345531 is about 1159.9702582394. The cubic root of 1345531 is about 110.3988550518.

Adding to 1345531 its product of digits (900), we get a palindrome (1346431).

It can be divided in two parts, 134 and 5531, that added together give a palindrome (5665).

The spelling of 1345531 in words is "one million, three hundred forty-five thousand, five hundred thirty-one".