1662140 has 24 divisors (see below), whose sum is σ = 3577392. Its totient is φ = 648320.

The previous prime is 1662121. The next prime is 1662149. The reversal of 1662140 is 412661.

1662140 = T₂₆₄ + T₂₆₅ + ... + T₃₀₄.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194 + ... + 1833.

It is an arithmetic number, because the mean of its divisors is an integer number (149058).

2^1662140 is an apocalyptic number.

1662140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662140 is an abundant number, since it is smaller than the sum of its proper divisors (1915252).

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

1662140 is a wasteful number, since it uses less digits than its factorization.

1662140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077 (or 2075 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1662140 is about 1289.2400862524. The cubic root of 1662140 is about 118.4556736894.

It can be divided in two parts, 16621 and 40, that added together give a palindrome (16661).

The spelling of 1662140 in words is "one million, six hundred sixty-two thousand, one hundred forty".