1342640 has 40 divisors (see below), whose sum is σ = 3364368. Its totient is φ = 495360.

The previous prime is 1342633. The next prime is 1342651. The reversal of 1342640 is 462431.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395 + ... + 1685.

2^1342640 is an apocalyptic number.

1342640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1342640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1682184).

1342640 is an abundant number, since it is smaller than the sum of its proper divisors (2021728).

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

1342640 is a wasteful number, since it uses less digits than its factorization.

1342640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1311 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1342640 is about 1158.7234355100. The cubic root of 1342640 is about 110.3197309125.

The spelling of 1342640 in words is "one million, three hundred forty-two thousand, six hundred forty".