1642965 has 24 divisors (see below), whose sum is σ = 2799840. Its totient is φ = 822528.

The previous prime is 1642951. The next prime is 1642997. The reversal of 1642965 is 5692461.

It is not a de Polignac number, because 1642965 - 2⁸ = 1642709 is a prime.

1642965 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4146 + ... + 4524.

It is an arithmetic number, because the mean of its divisors is an integer number (116660).

2^1642965 is an apocalyptic number.

1642965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642965 is a deficient number, since it is larger than the sum of its proper divisors (1156875).

1642965 is a wasteful number, since it uses less digits than its factorization.

1642965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 404 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 1642965 is about 1281.7819627378. The cubic root of 1642965 is about 117.9983960330.

The spelling of 1642965 in words is "one million, six hundred forty-two thousand, nine hundred sixty-five".