1003650555421 has 4 divisors (see below), whose sum is σ = 1003722212700. Its totient is φ = 1003578898144.

The previous prime is 1003650555409. The next prime is 1003650555443. The reversal of 1003650555421 is 1245550563001.

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 650903649796 + 352746905625 = 806786^2 + 593925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003650555421 - 2⁹ = 1003650554909 is a prime.

It is a super-3 number, since 3×1003650555421³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003650555821) 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, 35807626 + ... + 35835643.

It is an arithmetic number, because the mean of its divisors is an integer number (250930553175).

Almost surely, 2^{1003650555421} is an apocalyptic number.

It is an amenable number.

1003650555421 is a deficient number, since it is larger than the sum of its proper divisors (71657279).

1003650555421 is an equidigital number, since it uses as much as digits as its factorization.

1003650555421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71657278.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 1003650555421 in words is "one trillion, three billion, six hundred fifty million, five hundred fifty-five thousand, four hundred twenty-one".