1281457380601 has 4 divisors (see below), whose sum is σ = 1337172918912. Its totient is φ = 1225741842292.

The previous prime is 1281457380563. The next prime is 1281457380613. The reversal of 1281457380601 is 1060837541821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1281457380601 - 2¹³ = 1281457372409 is a prime.

It is a super-2 number, since 2×1281457380601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281457380101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27857769121 + ... + 27857769166.

It is an arithmetic number, because the mean of its divisors is an integer number (334293229728).

Almost surely, 2^{1281457380601} is an apocalyptic number.

It is an amenable number.

1281457380601 is a deficient number, since it is larger than the sum of its proper divisors (55715538311).

1281457380601 is an equidigital number, since it uses as much as digits as its factorization.

1281457380601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55715538310.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 1281457380601 in words is "one trillion, two hundred eighty-one billion, four hundred fifty-seven million, three hundred eighty thousand, six hundred one".