1142999971 has 2 divisors, whose sum is σ = 1142999972. Its totient is φ = 1142999970.

The previous prime is 1142999969. The next prime is 1142999983. The reversal of 1142999971 is 1799992411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1142999971 - 2¹ = 1142999969 is a prime.

Together with 1142999969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1142999071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571499985 + 571499986.

It is an arithmetic number, because the mean of its divisors is an integer number (571499986).

Almost surely, 2^1142999971 is an apocalyptic number.

1142999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142999971 is an equidigital number, since it uses as much as digits as its factorization.

1142999971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 52.

The square root of 1142999971 is about 33808.2825798650. The cubic root of 1142999971 is about 1045.5594696550.

The spelling of 1142999971 in words is "one billion, one hundred forty-two million, nine hundred ninety-nine thousand, nine hundred seventy-one".