1020420457 has 8 divisors (see below), whose sum is σ = 1166389632. Its totient is φ = 874500000.

The previous prime is 1020420437. The next prime is 1020420463. The reversal of 1020420457 is 7540240201.

1020420457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 1020420457 - 2⁷ = 1020420329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020420437) 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, 67332 + ... + 81082.

It is an arithmetic number, because the mean of its divisors is an integer number (145798704).

Almost surely, 2^1020420457 is an apocalyptic number.

It is an amenable number.

1020420457 is a deficient number, since it is larger than the sum of its proper divisors (145969175).

1020420457 is a wasteful number, since it uses less digits than its factorization.

1020420457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24359.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 1020420457 is about 31944.0206768027. The cubic root of 1020420457 is about 1006.7610047963.

Adding to 1020420457 its reverse (7540240201), we get a palindrome (8560660658).

The spelling of 1020420457 in words is "one billion, twenty million, four hundred twenty thousand, four hundred fifty-seven".