1551343 has 2 divisors, whose sum is σ = 1551344. Its totient is φ = 1551342.

The previous prime is 1551289. The next prime is 1551371. The reversal of 1551343 is 3431551.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3431551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1551343 - 2⁹ = 1550831 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775671 + 775672.

It is an arithmetic number, because the mean of its divisors is an integer number (775672).

2^1551343 is an apocalyptic number.

1551343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551343 is an equidigital number, since it uses as much as digits as its factorization.

1551343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 22.

The square root of 1551343 is about 1245.5292047961. The cubic root of 1551343 is about 115.7628677343.

Adding to 1551343 its reverse (3431551), we get a palindrome (4982894).

The spelling of 1551343 in words is "one million, five hundred fifty-one thousand, three hundred forty-three".