1345726237 has 12 divisors (see below), whose sum is σ = 1425315420. Its totient is φ = 1269054528.

The previous prime is 1345726229. The next prime is 1345726241. The reversal of 1345726237 is 7326275431.

It can be written as a sum of positive squares in 2 ways, for example, as 545175801 + 800550436 = 23349^2 + 28294^2 .

It is not a de Polignac number, because 1345726237 - 2³ = 1345726229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1345726237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345726637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41073 + ... + 66169.

It is an arithmetic number, because the mean of its divisors is an integer number (118776285).

Almost surely, 2^1345726237 is an apocalyptic number.

It is an amenable number.

1345726237 is a deficient number, since it is larger than the sum of its proper divisors (79589183).

1345726237 is an equidigital number, since it uses as much as digits as its factorization.

1345726237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25212 (or 25169 counting only the distinct ones).

The product of its digits is 211680, while the sum is 40.

The square root of 1345726237 is about 36684.1414919308. The cubic root of 1345726237 is about 1104.0419443058.

The spelling of 1345726237 in words is "one billion, three hundred forty-five million, seven hundred twenty-six thousand, two hundred thirty-seven".