1247340144 has 40 divisors (see below), whose sum is σ = 3290860800. Its totient is φ = 406932928.

The previous prime is 1247340137. The next prime is 1247340161. The reversal of 1247340144 is 4410437421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274194 + ... + 278705.

It is an arithmetic number, because the mean of its divisors is an integer number (82271520).

Almost surely, 2^1247340144 is an apocalyptic number.

It is an amenable number.

1247340144 is an abundant number, since it is smaller than the sum of its proper divisors (2043520656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1247340144 is a wasteful number, since it uses less digits than its factorization.

1247340144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552957 (or 552951 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 1247340144 is about 35317.7029830650. The cubic root of 1247340144 is about 1076.4527376222.

Adding to 1247340144 its reverse (4410437421), we get a palindrome (5657777565).

The spelling of 1247340144 in words is "one billion, two hundred forty-seven million, three hundred forty thousand, one hundred forty-four".