1345921841 has 24 divisors (see below), whose sum is σ = 1573068000. Its totient is φ = 1151261760.

The previous prime is 1345921831. The next prime is 1345921847. The reversal of 1345921841 is 1481295431.

It is not a de Polignac number, because 1345921841 - 2⁶ = 1345921777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1345921795 and 1345921804.

It is not an unprimeable number, because it can be changed into a prime (1345921847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 382910 + ... + 386408.

It is an arithmetic number, because the mean of its divisors is an integer number (65544500).

Almost surely, 2^1345921841 is an apocalyptic number.

1345921841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1345921841 is a deficient number, since it is larger than the sum of its proper divisors (227146159).

1345921841 is an equidigital number, since it uses as much as digits as its factorization.

1345921841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566 (or 3527 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 1345921841 is about 36686.8074517257. The cubic root of 1345921841 is about 1104.0954332825.

The spelling of 1345921841 in words is "one billion, three hundred forty-five million, nine hundred twenty-one thousand, eight hundred forty-one".