1142399971 has 2 divisors, whose sum is σ = 1142399972. Its totient is φ = 1142399970.

The previous prime is 1142399959. The next prime is 1142400031. The reversal of 1142399971 is 1799932411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1142399971 - 2⁵ = 1142399939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1142399911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571199985 + 571199986.

It is an arithmetic number, because the mean of its divisors is an integer number (571199986).

Almost surely, 2^1142399971 is an apocalyptic number.

1142399971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142399971 is an equidigital number, since it uses as much as digits as its factorization.

1142399971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 46.

The square root of 1142399971 is about 33799.4078498426. The cubic root of 1142399971 is about 1045.3764875904.

The spelling of 1142399971 in words is "one billion, one hundred forty-two million, three hundred ninety-nine thousand, nine hundred seventy-one".