1342781 has 8 divisors (see below), whose sum is σ = 1490400. Its totient is φ = 1199440.

The previous prime is 1342753. The next prime is 1342799. The reversal of 1342781 is 1872431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1342781 - 2¹⁰ = 1341757 is a prime.

It is a super-2 number, since 2×1342781² = 3606121627922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1342781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1342741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386 + ... + 1683.

It is an arithmetic number, because the mean of its divisors is an integer number (186300).

2^1342781 is an apocalyptic number.

1342781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1342781 is a deficient number, since it is larger than the sum of its proper divisors (147619).

1342781 is a wasteful number, since it uses less digits than its factorization.

1342781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139.

The product of its digits is 1344, while the sum is 26.

The square root of 1342781 is about 1158.7842767314. The cubic root of 1342781 is about 110.3235925923.

The spelling of 1342781 in words is "one million, three hundred forty-two thousand, seven hundred eighty-one".