1420667 has 2 divisors, whose sum is σ = 1420668. Its totient is φ = 1420666.

The previous prime is 1420651. The next prime is 1420697. The reversal of 1420667 is 7660241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1420667 - 2⁴ = 1420651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1420607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710333 + 710334.

It is an arithmetic number, because the mean of its divisors is an integer number (710334).

2^1420667 is an apocalyptic number.

1420667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420667 is an equidigital number, since it uses as much as digits as its factorization.

1420667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1420667 is about 1191.9173629073. The cubic root of 1420667 is about 112.4166823430.

The spelling of 1420667 in words is "one million, four hundred twenty thousand, six hundred sixty-seven".