1621212052 has 12 divisors (see below), whose sum is σ = 2838779776. Its totient is φ = 810132120.

The previous prime is 1621212029. The next prime is 1621212059. The reversal of 1621212052 is 2502121261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621212059) 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, 110724 + ... + 124507.

Almost surely, 2^1621212052 is an apocalyptic number.

It is an amenable number.

1621212052 is a deficient number, since it is larger than the sum of its proper divisors (1217567724).

1621212052 is a wasteful number, since it uses less digits than its factorization.

1621212052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236958 (or 236956 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1621212052 is about 40264.2776167660. The cubic root of 1621212052 is about 1174.7531219969.

The spelling of 1621212052 in words is "one billion, six hundred twenty-one million, two hundred twelve thousand, fifty-two".