1201919 has 2 divisors, whose sum is σ = 1201920. Its totient is φ = 1201918.

The previous prime is 1201909. The next prime is 1201939. The reversal of 1201919 is 9191021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201919 - 2¹⁶ = 1136383 is a prime.

It is a super-2 number, since 2×1201919² = 2889218565122, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1201894 and 1201903.

It is a congruent number.

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, 600959 + 600960.

It is an arithmetic number, because the mean of its divisors is an integer number (600960).

2^1201919 is an apocalyptic number.

1201919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201919 is an equidigital number, since it uses as much as digits as its factorization.

1201919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1201919 is about 1096.3206647692. The cubic root of 1201919 is about 106.3224723552.

The spelling of 1201919 in words is "one million, two hundred one thousand, nine hundred nineteen".