1230440247 has 64 divisors (see below), whose sum is σ = 1969408000. Its totient is φ = 756946944.

The previous prime is 1230440149. The next prime is 1230440257. The reversal of 1230440247 is 7420440321.

It is not a de Polignac number, because 1230440247 - 2²³ = 1222051639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 1230440247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230440257) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3930963 + ... + 3931275.

It is an arithmetic number, because the mean of its divisors is an integer number (30772000).

Almost surely, 2^1230440247 is an apocalyptic number.

1230440247 is a deficient number, since it is larger than the sum of its proper divisors (738967753).

1230440247 is a wasteful number, since it uses less digits than its factorization.

1230440247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 1230440247 is about 35077.6317188034. The cubic root of 1230440247 is about 1071.5690860968.

Adding to 1230440247 its reverse (7420440321), we get a palindrome (8650880568).

The spelling of 1230440247 in words is "one billion, two hundred thirty million, four hundred forty thousand, two hundred forty-seven".