1142640407 has 2 divisors, whose sum is σ = 1142640408. Its totient is φ = 1142640406.

The previous prime is 1142640379. The next prime is 1142640451. The reversal of 1142640407 is 7040462411.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7040462411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1142640407 - 2⁸ = 1142640151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1142640407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142640497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571320203 + 571320204.

It is an arithmetic number, because the mean of its divisors is an integer number (571320204).

Almost surely, 2^1142640407 is an apocalyptic number.

1142640407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142640407 is an equidigital number, since it uses as much as digits as its factorization.

1142640407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 1142640407 is about 33802.9644705904. The cubic root of 1142640407 is about 1045.4498210744.

The spelling of 1142640407 in words is "one billion, one hundred forty-two million, six hundred forty thousand, four hundred seven".