1621252652 has 12 divisors (see below), whose sum is σ = 2838489696. Its totient is φ = 810255600.

The previous prime is 1621252649. The next prime is 1621252679. The reversal of 1621252652 is 2562521261.

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, 82724 + ... + 100427.

It is an arithmetic number, because the mean of its divisors is an integer number (236540808).

Almost surely, 2^1621252652 is an apocalyptic number.

It is an amenable number.

1621252652 is a deficient number, since it is larger than the sum of its proper divisors (1217237044).

1621252652 is a wasteful number, since it uses less digits than its factorization.

1621252652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185368 (or 185366 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 1621252652 is about 40264.7817825951. The cubic root of 1621252652 is about 1174.7629283592.

The spelling of 1621252652 in words is "one billion, six hundred twenty-one million, two hundred fifty-two thousand, six hundred fifty-two".