1020054251 has 4 divisors (see below), whose sum is σ = 1020346992. Its totient is φ = 1019761512.

The previous prime is 1020054229. The next prime is 1020054253. The reversal of 1020054251 is 1524500201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020054251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020054253) 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, 141080 + ... + 148133.

It is an arithmetic number, because the mean of its divisors is an integer number (255086748).

Almost surely, 2^1020054251 is an apocalyptic number.

1020054251 is a deficient number, since it is larger than the sum of its proper divisors (292741).

1020054251 is an equidigital number, since it uses as much as digits as its factorization.

1020054251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292740.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1020054251 is about 31938.2881663999. The cubic root of 1020054251 is about 1006.6405557433.

Adding to 1020054251 its reverse (1524500201), we get a palindrome (2544554452).

The spelling of 1020054251 in words is "one billion, twenty million, fifty-four thousand, two hundred fifty-one".