1670421451 has 2 divisors, whose sum is σ = 1670421452. Its totient is φ = 1670421450.

The previous prime is 1670421317. The next prime is 1670421457. The reversal of 1670421451 is 1541240761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1670421451 - 2¹⁵ = 1670388683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1670421457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835210725 + 835210726.

It is an arithmetic number, because the mean of its divisors is an integer number (835210726).

Almost surely, 2^1670421451 is an apocalyptic number.

1670421451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670421451 is an equidigital number, since it uses as much as digits as its factorization.

1670421451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1670421451 is about 40870.7897036502. The cubic root of 1670421451 is about 1186.5207915290.

The spelling of 1670421451 in words is "one billion, six hundred seventy million, four hundred twenty-one thousand, four hundred fifty-one".