1345234421 has 2 divisors, whose sum is σ = 1345234422. Its totient is φ = 1345234420.

The previous prime is 1345234417. The next prime is 1345234427. The reversal of 1345234421 is 1244325431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 946792900 + 398441521 = 30770^2 + 19961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345234421 - 2² = 1345234417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345234427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672617210 + 672617211.

It is an arithmetic number, because the mean of its divisors is an integer number (672617211).

Almost surely, 2^1345234421 is an apocalyptic number.

It is an amenable number.

1345234421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345234421 is an equidigital number, since it uses as much as digits as its factorization.

1345234421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 29.

The square root of 1345234421 is about 36677.4374922785. The cubic root of 1345234421 is about 1103.9074316442.

Adding to 1345234421 its reverse (1244325431), we get a palindrome (2589559852).

The spelling of 1345234421 in words is "one billion, three hundred forty-five million, two hundred thirty-four thousand, four hundred twenty-one".