1294720452 has 18 divisors (see below), whose sum is σ = 3272765678. Its totient is φ = 431573472.

The previous prime is 1294720447. The next prime is 1294720519. The reversal of 1294720452 is 2540274921.

It can be written as a sum of positive squares in only one way, i.e., 781426116 + 513294336 = 27954^2 + 22656^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 35964457 = 1294720452 / (1 + 2 + 9 + 4 + 7 + 2 + 0 + 4 + 5 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17982193 + ... + 17982264.

Almost surely, 2^1294720452 is an apocalyptic number.

1294720452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1294720452 is an abundant number, since it is smaller than the sum of its proper divisors (1978045226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1294720452 is a wasteful number, since it uses less digits than its factorization.

1294720452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35964467 (or 35964462 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1294720452 is about 35982.2241113581. The cubic root of 1294720452 is about 1089.9134268979.

The spelling of 1294720452 in words is "one billion, two hundred ninety-four million, seven hundred twenty thousand, four hundred fifty-two".