1605941002 has 4 divisors (see below), whose sum is σ = 2408911506. Its totient is φ = 802970500.

The previous prime is 1605940991. The next prime is 1605941039. The reversal of 1605941002 is 2001495061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2001495061 = 137 ⋅14609453.

It can be written as a sum of positive squares in only one way, i.e., 1258901361 + 347039641 = 35481^2 + 18629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401485249 + ... + 401485252.

Almost surely, 2^1605941002 is an apocalyptic number.

1605941002 is a deficient number, since it is larger than the sum of its proper divisors (802970504).

1605941002 is an equidigital number, since it uses as much as digits as its factorization.

1605941002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802970503.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1605941002 is about 40074.1937161560. The cubic root of 1605941002 is about 1171.0529401601.

It can be divided in two parts, 160594 and 1002, that added together give a triangular number (161596 = T₅₆₈).

The spelling of 1605941002 in words is "one billion, six hundred five million, nine hundred forty-one thousand, two".