1373749 has 4 divisors (see below), whose sum is σ = 1479436. Its totient is φ = 1268064.

The previous prime is 1373717. The next prime is 1373761. The reversal of 1373749 is 9473731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 651249 + 722500 = 807^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373749 - 2⁵ = 1373717 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52824 + ... + 52849.

It is an arithmetic number, because the mean of its divisors is an integer number (369859).

2^1373749 is an apocalyptic number.

It is an amenable number.

1373749 is a deficient number, since it is larger than the sum of its proper divisors (105687).

1373749 is a wasteful number, since it uses less digits than its factorization.

1373749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105686.

The product of its digits is 15876, while the sum is 34.

The square root of 1373749 is about 1172.0703903776. The cubic root of 1373749 is about 111.1652706705.

The spelling of 1373749 in words is "one million, three hundred seventy-three thousand, seven hundred forty-nine".