1020638201 has 8 divisors (see below), whose sum is σ = 1113875904. Its totient is φ = 927475920.

The previous prime is 1020638183. The next prime is 1020638221. The reversal of 1020638201 is 1028360201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020638201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1020638221) 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, 11591 + ... + 46643.

It is an arithmetic number, because the mean of its divisors is an integer number (139234488).

Almost surely, 2^1020638201 is an apocalyptic number.

1020638201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020638201 is a deficient number, since it is larger than the sum of its proper divisors (93237703).

1020638201 is a wasteful number, since it uses less digits than its factorization.

1020638201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37711.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1020638201 is about 31947.4287071745. The cubic root of 1020638201 is about 1006.8326094556.

Adding to 1020638201 its reverse (1028360201), we get a palindrome (2048998402).

The spelling of 1020638201 in words is "one billion, twenty million, six hundred thirty-eight thousand, two hundred one".