1621140504 has 16 divisors (see below), whose sum is σ = 4052851320. Its totient is φ = 540380160.

The previous prime is 1621140503. The next prime is 1621140511. The reversal of 1621140504 is 4050411261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 67547521 = 1621140504 / (1 + 6 + 2 + 1 + 1 + 4 + 0 + 5 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621140503) 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, 33773737 + ... + 33773784.

Almost surely, 2^1621140504 is an apocalyptic number.

It is an amenable number.

1621140504 is an abundant number, since it is smaller than the sum of its proper divisors (2431710816).

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

1621140504 is a wasteful number, since it uses less digits than its factorization.

1621140504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67547530 (or 67547526 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1621140504 is about 40263.3891270966. The cubic root of 1621140504 is about 1174.7358401793.

Adding to 1621140504 its reverse (4050411261), we get a palindrome (5671551765).

The spelling of 1621140504 in words is "one billion, six hundred twenty-one million, one hundred forty thousand, five hundred four".