2121967 has 2 divisors, whose sum is σ = 2121968. Its totient is φ = 2121966.

The previous prime is 2121943. The next prime is 2121979. The reversal of 2121967 is 7691212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121967 - 2¹¹ = 2119919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060983 + 1060984.

It is an arithmetic number, because the mean of its divisors is an integer number (1060984).

2^2121967 is an apocalyptic number.

2121967 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121967 is an equidigital number, since it uses as much as digits as its factorization.

2121967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 2121967 is about 1456.6972918215. The cubic root of 2121967 is about 128.5028841576.

The spelling of 2121967 in words is "two million, one hundred twenty-one thousand, nine hundred sixty-seven".