1670452021 has 16 divisors (see below), whose sum is σ = 1922457600. Its totient is φ = 1421825328.

The previous prime is 1670452009. The next prime is 1670452033. The reversal of 1670452021 is 1202540761.

It is an interprime number because it is at equal distance from previous prime (1670452009) and next prime (1670452033).

It is not a de Polignac number, because 1670452021 - 2¹⁹ = 1669927733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670452001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699796 + ... + 702178.

It is an arithmetic number, because the mean of its divisors is an integer number (120153600).

Almost surely, 2^1670452021 is an apocalyptic number.

It is an amenable number.

1670452021 is a deficient number, since it is larger than the sum of its proper divisors (252005579).

1670452021 is a wasteful number, since it uses less digits than its factorization.

1670452021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1670452021 is about 40871.1636854152. The cubic root of 1670452021 is about 1186.5280295665.

Adding to 1670452021 its reverse (1202540761), we get a palindrome (2872992782).

The spelling of 1670452021 in words is "one billion, six hundred seventy million, four hundred fifty-two thousand, twenty-one".