1421550667 has 2 divisors, whose sum is σ = 1421550668. Its totient is φ = 1421550666.

The previous prime is 1421550643. The next prime is 1421550671. The reversal of 1421550667 is 7660551241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1421550667 - 2²³ = 1413162059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421550367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710775333 + 710775334.

It is an arithmetic number, because the mean of its divisors is an integer number (710775334).

Almost surely, 2^1421550667 is an apocalyptic number.

1421550667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421550667 is an equidigital number, since it uses as much as digits as its factorization.

1421550667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 1421550667 is about 37703.4569635199. The cubic root of 1421550667 is about 1124.3998555736.

The spelling of 1421550667 in words is "one billion, four hundred twenty-one million, five hundred fifty thousand, six hundred sixty-seven".