1281560023 has 8 divisors (see below), whose sum is σ = 1351068768. Its totient is φ = 1213200384.

The previous prime is 1281560017. The next prime is 1281560047. The reversal of 1281560023 is 3200651821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1281560023 - 2⁵ = 1281559991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1281559973 and 1281560000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281500023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284986 + ... + 289447.

It is an arithmetic number, because the mean of its divisors is an integer number (168883596).

Almost surely, 2^1281560023 is an apocalyptic number.

1281560023 is a deficient number, since it is larger than the sum of its proper divisors (69508745).

1281560023 is an equidigital number, since it uses as much as digits as its factorization.

1281560023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574553.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1281560023 is about 35798.8829853670. The cubic root of 1281560023 is about 1086.2079669259.

The spelling of 1281560023 in words is "one billion, two hundred eighty-one million, five hundred sixty thousand, twenty-three".