20121602 has 4 divisors (see below), whose sum is σ = 30182406. Its totient is φ = 10060800.

The previous prime is 20121581. The next prime is 20121623. The reversal of 20121602 is 20612102.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20121581) and next prime (20121623).

It can be written as a sum of positive squares in only one way, i.e., 18913801 + 1207801 = 4349^2 + 1099^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030399 + ... + 5030402.

Almost surely, 2^20121602 is an apocalyptic number.

20121602 is a deficient number, since it is larger than the sum of its proper divisors (10060804).

20121602 is a wasteful number, since it uses less digits than its factorization.

20121602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060803.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20121602 is about 4485.7108689705. The cubic root of 20121602 is about 271.9907814782.

Adding to 20121602 its reverse (20612102), we get a palindrome (40733704).

The spelling of 20121602 in words is "twenty million, one hundred twenty-one thousand, six hundred two".