1245444000 has 96 divisors (see below), whose sum is σ = 4080113856. Its totient is φ = 332115200.

The previous prime is 1245443963. The next prime is 1245444001. The reversal of 1245444000 is 4445421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1245444000² = 3102261514272000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1245444001) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 39894 + ... + 63893.

It is an arithmetic number, because the mean of its divisors is an integer number (42501186).

Almost surely, 2^1245444000 is an apocalyptic number.

1245444000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245444000 is an abundant number, since it is smaller than the sum of its proper divisors (2834669856).

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

1245444000 is a wasteful number, since it uses less digits than its factorization.

1245444000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103815 (or 103797 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1245444000 is about 35290.8486721416. The cubic root of 1245444000 is about 1075.9070044881.

Adding to 1245444000 its reverse (4445421), we get a palindrome (1249889421).

The spelling of 1245444000 in words is "one billion, two hundred forty-five million, four hundred forty-four thousand".