1201939 has 2 divisors, whose sum is σ = 1201940. Its totient is φ = 1201938.

The previous prime is 1201919. The next prime is 1201961. The reversal of 1201939 is 9391021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201939 - 2¹⁵ = 1169171 is a prime.

It is equal to p₉₃₀₆₇ and since 1201939 and 93067 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1201909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600969 + 600970.

It is an arithmetic number, because the mean of its divisors is an integer number (600970).

2^1201939 is an apocalyptic number.

1201939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201939 is an equidigital number, since it uses as much as digits as its factorization.

1201939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1201939 is about 1096.3297861501. The cubic root of 1201939 is about 106.3230620892.

The spelling of 1201939 in words is "one million, two hundred one thousand, nine hundred thirty-nine".