1202142091 has 2 divisors, whose sum is σ = 1202142092. Its totient is φ = 1202142090.

The previous prime is 1202142083. The next prime is 1202142101. The reversal of 1202142091 is 1902412021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1202142091 - 2³ = 1202142083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1202142001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601071045 + 601071046.

It is an arithmetic number, because the mean of its divisors is an integer number (601071046).

Almost surely, 2^1202142091 is an apocalyptic number.

1202142091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202142091 is an equidigital number, since it uses as much as digits as its factorization.

1202142091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1202142091 is about 34671.9207861347. The cubic root of 1202142091 is about 1063.2905020259.

The spelling of 1202142091 in words is "one billion, two hundred two million, one hundred forty-two thousand, ninety-one".