1621727052 has 24 divisors (see below), whose sum is σ = 4128032832. Its totient is φ = 491432400.

The previous prime is 1621727011. The next prime is 1621727059. The reversal of 1621727052 is 2507271261.

It is a super-2 number, since 2×1621727052² = 5259997262377221408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1621727059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6142774 + ... + 6143037.

It is an arithmetic number, because the mean of its divisors is an integer number (172001368).

Almost surely, 2^1621727052 is an apocalyptic number.

1621727052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621727052 is an abundant number, since it is smaller than the sum of its proper divisors (2506305780).

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

1621727052 is a wasteful number, since it uses less digits than its factorization.

1621727052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12285829 (or 12285827 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 1621727052 is about 40270.6723559466. The cubic root of 1621727052 is about 1174.8775009158.

The spelling of 1621727052 in words is "one billion, six hundred twenty-one million, seven hundred twenty-seven thousand, fifty-two".