1020653401 has 4 divisors (see below), whose sum is σ = 1020968704. Its totient is φ = 1020338100.

The previous prime is 1020653371. The next prime is 1020653441. The reversal of 1020653401 is 1043560201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1043560201 = 71 ⋅14698031.

It is a cyclic number.

It is not a de Polignac number, because 1020653401 - 2⁷ = 1020653273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020653441) 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, 152745 + ... + 159286.

It is an arithmetic number, because the mean of its divisors is an integer number (255242176).

Almost surely, 2^1020653401 is an apocalyptic number.

It is an amenable number.

1020653401 is a deficient number, since it is larger than the sum of its proper divisors (315303).

1020653401 is an equidigital number, since it uses as much as digits as its factorization.

1020653401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315302.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1020653401 is about 31947.6665971085. Note that the first 3 decimals coincide. The cubic root of 1020653401 is about 1006.8376075635.

The spelling of 1020653401 in words is "one billion, twenty million, six hundred fifty-three thousand, four hundred one".