1201979 has 4 divisors (see below), whose sum is σ = 1229976. Its totient is φ = 1173984.

The previous prime is 1201969. The next prime is 1201999. The reversal of 1201979 is 9791021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9791021 = 139 ⋅70439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13934 + ... + 14019.

It is an arithmetic number, because the mean of its divisors is an integer number (307494).

2^1201979 is an apocalyptic number.

1201979 is a deficient number, since it is larger than the sum of its proper divisors (27997).

1201979 is an equidigital number, since it uses as much as digits as its factorization.

1201979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27996.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 1201979 is about 1096.3480286843. The cubic root of 1201979 is about 106.3242415377.

The spelling of 1201979 in words is "one million, two hundred one thousand, nine hundred seventy-nine".