1345885431 has 16 divisors (see below), whose sum is σ = 1971742080. Its totient is φ = 809817120.

The previous prime is 1345885417. The next prime is 1345885439.

It is a happy number.

1345885431 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1345885431 - 2⁹ = 1345884919 is a prime.

It is a super-2 number, since 2×1345885431² = 3622815186756111522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345885439) 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, 142120 + ... + 151293.

It is an arithmetic number, because the mean of its divisors is an integer number (123233880).

Almost surely, 2^1345885431 is an apocalyptic number.

1345885431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1345885431 is a deficient number, since it is larger than the sum of its proper divisors (625856649).

1345885431 is a wasteful number, since it uses less digits than its factorization.

1345885431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293566.

The product of its digits is 230400, while the sum is 42.

The square root of 1345885431 is about 36686.3112209445. The cubic root of 1345885431 is about 1104.0854771627.

It can be divided in two parts, 13458 and 85431, that added together give a palindrome (98889).

The spelling of 1345885431 in words is "one billion, three hundred forty-five million, eight hundred eighty-five thousand, four hundred thirty-one".