1621054412 has 18 divisors (see below), whose sum is σ = 2938046748. Its totient is φ = 782576368.

The previous prime is 1621054403. The next prime is 1621054423. The reversal of 1621054412 is 2144501261.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 237578 + ... + 244305.

Almost surely, 2^1621054412 is an apocalyptic number.

It is an amenable number.

1621054412 is a deficient number, since it is larger than the sum of its proper divisors (1316992336).

1621054412 is a wasteful number, since it uses less digits than its factorization.

1621054412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481945 (or 481914 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1621054412 is about 40262.3200027023. The cubic root of 1621054412 is about 1174.7150447068.

Adding to 1621054412 its reverse (2144501261), we get a palindrome (3765555673).

The spelling of 1621054412 in words is "one billion, six hundred twenty-one million, fifty-four thousand, four hundred twelve".