1240543147 has 2 divisors, whose sum is σ = 1240543148. Its totient is φ = 1240543146.

The previous prime is 1240543103. The next prime is 1240543181. The reversal of 1240543147 is 7413450421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240543147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240544147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620271573 + 620271574.

It is an arithmetic number, because the mean of its divisors is an integer number (620271574).

Almost surely, 2^1240543147 is an apocalyptic number.

1240543147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240543147 is an equidigital number, since it uses as much as digits as its factorization.

1240543147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 1240543147 is about 35221.3450481381. The cubic root of 1240543147 is about 1074.4939091017.

Adding to 1240543147 its reverse (7413450421), we get a palindrome (8653993568).

The spelling of 1240543147 in words is "one billion, two hundred forty million, five hundred forty-three thousand, one hundred forty-seven".