1020667 has 2 divisors, whose sum is σ = 1020668. Its totient is φ = 1020666.

The previous prime is 1020631. The next prime is 1020683. The reversal of 1020667 is 7660201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020667 is a prime.

It is a super-2 number, since 2×1020667² = 2083522249778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1020967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510333 + 510334.

It is an arithmetic number, because the mean of its divisors is an integer number (510334).

2^1020667 is an apocalyptic number.

1020667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020667 is an equidigital number, since it uses as much as digits as its factorization.

1020667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1020667 is about 1010.2806540759. The cubic root of 1020667 is about 100.6842079184.

Adding to 1020667 its reverse (7660201), we get a palindrome (8680868).

The spelling of 1020667 in words is "one million, twenty thousand, six hundred sixty-seven".