1640754 has 12 divisors (see below), whose sum is σ = 3555006. Its totient is φ = 546912.

The previous prime is 1640753. The next prime is 1640761. The reversal of 1640754 is 4570461.

It can be written as a sum of positive squares in only one way, i.e., 1625625 + 15129 = 1275^2 + 123^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1640753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45559 + ... + 45594.

2^1640754 is an apocalyptic number.

1640754 is an abundant number, since it is smaller than the sum of its proper divisors (1914252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640754 is a wasteful number, since it uses less digits than its factorization.

1640754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91161 (or 91158 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1640754 is about 1280.9192011989. The cubic root of 1640754 is about 117.9454406397.

It can be divided in two parts, 16407 and 54, that added together give a palindrome (16461).

The spelling of 1640754 in words is "one million, six hundred forty thousand, seven hundred fifty-four".