1230488281 has 4 divisors (see below), whose sum is σ = 1342350864. Its totient is φ = 1118625700.

The previous prime is 1230488267. The next prime is 1230488321. The reversal of 1230488281 is 1828840321.

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 1230488281 - 2⁵ = 1230488249 is a prime.

It is a super-2 number, since 2×1230488281² = 3028202819356669922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230488281.

It is not an unprimeable number, because it can be changed into a prime (1230488261) 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, 55931275 + ... + 55931296.

It is an arithmetic number, because the mean of its divisors is an integer number (335587716).

Almost surely, 2^1230488281 is an apocalyptic number.

1230488281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1230488281 is the 15688-th centered decagonal number.

It is an amenable number.

1230488281 is a deficient number, since it is larger than the sum of its proper divisors (111862583).

1230488281 is a wasteful number, since it uses less digits than its factorization.

1230488281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111862582.

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 1230488281 is about 35078.3163934645. The cubic root of 1230488281 is about 1071.5830299081.

The spelling of 1230488281 in words is "one billion, two hundred thirty million, four hundred eighty-eight thousand, two hundred eighty-one".