1621417436 has 12 divisors (see below), whose sum is σ = 2838237360. Its totient is φ = 810492480.

The previous prime is 1621417423. The next prime is 1621417477. The reversal of 1621417436 is 6347141261.

It is a junction number, because it is equal to n+sod(n) for n = 1621417396 and 1621417405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36560 + ... + 67671.

It is an arithmetic number, because the mean of its divisors is an integer number (236519780).

Almost surely, 2^1621417436 is an apocalyptic number.

It is an amenable number.

1621417436 is a deficient number, since it is larger than the sum of its proper divisors (1216819924).

1621417436 is a wasteful number, since it uses less digits than its factorization.

1621417436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108124 (or 108122 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 1621417436 is about 40266.8279853281. The cubic root of 1621417436 is about 1174.8027279500.

Adding to 1621417436 its reverse (6347141261), we get a palindrome (7968558697).

The spelling of 1621417436 in words is "one billion, six hundred twenty-one million, four hundred seventeen thousand, four hundred thirty-six".