1207121 has 2 divisors, whose sum is σ = 1207122. Its totient is φ = 1207120.

The previous prime is 1207117. The next prime is 1207123. The reversal of 1207121 is 1217021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123600 + 83521 = 1060^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1207121 - 2² = 1207117 is a prime.

It is a super-2 number, since 2×1207121² = 2914282217282, which contains 22 as substring.

Together with 1207123, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1207096 and 1207105.

It is not a weakly prime, because it can be changed into another prime (1207123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603560 + 603561.

It is an arithmetic number, because the mean of its divisors is an integer number (603561).

2^1207121 is an apocalyptic number.

It is an amenable number.

1207121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1207121 is an equidigital number, since it uses as much as digits as its factorization.

1207121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 1207121 is about 1098.6905842866. The cubic root of 1207121 is about 106.4756422654.

The spelling of 1207121 in words is "one million, two hundred seven thousand, one hundred twenty-one".