1201042187 has 2 divisors, whose sum is σ = 1201042188. Its totient is φ = 1201042186.

The previous prime is 1201042153. The next prime is 1201042253. The reversal of 1201042187 is 7812401021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201042187 - 2²⁶ = 1133933323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1209042187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600521093 + 600521094.

It is an arithmetic number, because the mean of its divisors is an integer number (600521094).

Almost surely, 2^1201042187 is an apocalyptic number.

1201042187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201042187 is an equidigital number, since it uses as much as digits as its factorization.

1201042187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 1201042187 is about 34656.0555603202. The cubic root of 1201042187 is about 1062.9661159845.

The spelling of 1201042187 in words is "one billion, two hundred one million, forty-two thousand, one hundred eighty-seven".