1371749 has 2 divisors, whose sum is σ = 1371750. Its totient is φ = 1371748.

The previous prime is 1371731. The next prime is 1371763. The reversal of 1371749 is 9471731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 351649 = 1010^2 + 593^2 .

It is an emirp because it is prime and its reverse (9471731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1371749 - 2⁸ = 1371493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1371779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685874 + 685875.

It is an arithmetic number, because the mean of its divisors is an integer number (685875).

2^1371749 is an apocalyptic number.

It is an amenable number.

1371749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371749 is an equidigital number, since it uses as much as digits as its factorization.

1371749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 32.

The square root of 1371749 is about 1171.2168885394. The cubic root of 1371749 is about 111.1112970738. Note that the first 3 decimals are identical.

The spelling of 1371749 in words is "one million, three hundred seventy-one thousand, seven hundred forty-nine".