1000550401 has 4 divisors (see below), whose sum is σ = 1003122900. Its totient is φ = 997977904.

The previous prime is 1000550399. The next prime is 1000550413. The reversal of 1000550401 is 1040550001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 715616001 + 284934400 = 26751^2 + 16880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000550401 - 2¹ = 1000550399 is a prime.

It is a super-2 number, since 2×1000550401² = 2002202209882521602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000550461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285666 + ... + 1286443.

It is an arithmetic number, because the mean of its divisors is an integer number (250780725).

Almost surely, 2^1000550401 is an apocalyptic number.

It is an amenable number.

1000550401 is a deficient number, since it is larger than the sum of its proper divisors (2572499).

1000550401 is an equidigital number, since it uses as much as digits as its factorization.

1000550401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572498.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1000550401 is about 31631.4780084649. The cubic root of 1000550401 is about 1000.1834333501.

It can be divided in two parts, 10005 and 50401, that added together give a palindrome (60406).

The spelling of 1000550401 in words is "one billion, five hundred fifty thousand, four hundred one".