1345212131 has 8 divisors (see below), whose sum is σ = 1369117440. Its totient is φ = 1321419528.

The previous prime is 1345212119. The next prime is 1345212137. The reversal of 1345212131 is 1312125431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1345212131 - 2¹⁸ = 1344949987 is a prime.

It is a super-2 number, since 2×1345212131² = 3619191354779122322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1345212097 and 1345212106.

It is not an unprimeable number, because it can be changed into a prime (1345212137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3911 + ... + 52016.

It is an arithmetic number, because the mean of its divisors is an integer number (171139680).

Almost surely, 2^1345212131 is an apocalyptic number.

1345212131 is a deficient number, since it is larger than the sum of its proper divisors (23905309).

1345212131 is an equidigital number, since it uses as much as digits as its factorization.

1345212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56353.

The product of its digits is 720, while the sum is 23.

The square root of 1345212131 is about 36677.1336257347. The cubic root of 1345212131 is about 1103.9013345080.

Adding to 1345212131 its reverse (1312125431), we get a palindrome (2657337562).

The spelling of 1345212131 in words is "one billion, three hundred forty-five million, two hundred twelve thousand, one hundred thirty-one".