1424778749 has 8 divisors (see below), whose sum is σ = 1429034040. Its totient is φ = 1420531200.

The previous prime is 1424778743. The next prime is 1424778763. The reversal of 1424778749 is 9478774241.

It can be written as a sum of positive squares in 4 ways, for example, as 5373124 + 1419405625 = 2318^2 + 37675^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1424778749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1424778749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1424778743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623489 + ... + 625769.

It is an arithmetic number, because the mean of its divisors is an integer number (178629255).

Almost surely, 2^1424778749 is an apocalyptic number.

It is an amenable number.

1424778749 is a deficient number, since it is larger than the sum of its proper divisors (4255291).

1424778749 is an equidigital number, since it uses as much as digits as its factorization.

1424778749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871.

The product of its digits is 3161088, while the sum is 53.

The square root of 1424778749 is about 37746.2415215078. The cubic root of 1424778749 is about 1125.2503144075.

The spelling of 1424778749 in words is "one billion, four hundred twenty-four million, seven hundred seventy-eight thousand, seven hundred forty-nine".