1004451550 has 12 divisors (see below), whose sum is σ = 1868279976. Its totient is φ = 401780600.

The previous prime is 1004451533. The next prime is 1004451557. The reversal of 1004451550 is 551544001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004451557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10044466 + ... + 10044565.

It is an arithmetic number, because the mean of its divisors is an integer number (155689998).

Almost surely, 2^1004451550 is an apocalyptic number.

1004451550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1004451550 is a deficient number, since it is larger than the sum of its proper divisors (863828426).

1004451550 is a wasteful number, since it uses less digits than its factorization.

1004451550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20089043 (or 20089038 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1004451550 is about 31693.0836303443. The cubic root of 1004451550 is about 1001.4816536183.

Adding to 1004451550 its reverse (551544001), we get a palindrome (1555995551).

It can be divided in two parts, 1004451 and 550, that added together give a palindrome (1005001).

The spelling of 1004451550 in words is "one billion, four million, four hundred fifty-one thousand, five hundred fifty".