1243749 has 8 divisors (see below), whose sum is σ = 1785952. Its totient is φ = 765360.

The previous prime is 1243747. The next prime is 1243783. The reversal of 1243749 is 9473421.

It is a happy number.

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

It is not a de Polignac number, because 1243749 - 2¹ = 1243747 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 (1243741) 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, 15907 + ... + 15984.

It is an arithmetic number, because the mean of its divisors is an integer number (223244).

2^1243749 is an apocalyptic number.

It is an amenable number.

1243749 is a deficient number, since it is larger than the sum of its proper divisors (542203).

1243749 is a wasteful number, since it uses less digits than its factorization.

1243749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31907.

The product of its digits is 6048, while the sum is 30.

The square root of 1243749 is about 1115.2349528238. The cubic root of 1243749 is about 107.5418693945.

The spelling of 1243749 in words is "one million, two hundred forty-three thousand, seven hundred forty-nine".