1281834401 has 6 divisors (see below), whose sum is σ = 1317416310. Its totient is φ = 1247188896.

The previous prime is 1281834383. The next prime is 1281834403. The reversal of 1281834401 is 1044381821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 295874401 + 985960000 = 17201^2 + 31400^2 .

It is not a de Polignac number, because 1281834401 - 2¹⁴ = 1281818017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281834403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 466796 + ... + 469533.

It is an arithmetic number, because the mean of its divisors is an integer number (219569385).

Almost surely, 2^1281834401 is an apocalyptic number.

It is an amenable number.

1281834401 is a deficient number, since it is larger than the sum of its proper divisors (35581909).

1281834401 is an frugal number, since it uses more digits than its factorization.

1281834401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936403 (or 936366 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 1281834401 is about 35802.7149948157. The cubic root of 1281834401 is about 1086.2854793060.

The spelling of 1281834401 in words is "one billion, two hundred eighty-one million, eight hundred thirty-four thousand, four hundred one".