1340551 has 8 divisors (see below), whose sum is σ = 1382400. Its totient is φ = 1299480.

The previous prime is 1340527. The next prime is 1340557. The reversal of 1340551 is 1550431.

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

It is a cyclic number.

It is not a de Polignac number, because 1340551 - 2⁹ = 1340039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340557) 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, 5490 + ... + 5728.

It is an arithmetic number, because the mean of its divisors is an integer number (172800).

2^1340551 is an apocalyptic number.

1340551 is a deficient number, since it is larger than the sum of its proper divisors (41849).

1340551 is an equidigital number, since it uses as much as digits as its factorization.

1340551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1340551 is about 1157.8216615697. The cubic root of 1340551 is about 110.2624860954.

Adding to 1340551 its reverse (1550431), we get a palindrome (2890982).

It can be divided in two parts, 13405 and 51, that added together give a square (13456 = 116²).

The spelling of 1340551 in words is "one million, three hundred forty thousand, five hundred fifty-one".