1355020401 has 32 divisors (see below), whose sum is σ = 2146249728. Its totient is φ = 744258240.

The previous prime is 1355020393. The next prime is 1355020409. The reversal of 1355020401 is 1040205531.

It is an interprime number because it is at equal distance from previous prime (1355020393) and next prime (1355020409).

It is not a de Polignac number, because 1355020401 - 2³ = 1355020393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1355020409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53986 + ... + 74996.

It is an arithmetic number, because the mean of its divisors is an integer number (67070304).

Almost surely, 2^1355020401 is an apocalyptic number.

It is an amenable number.

1355020401 is a deficient number, since it is larger than the sum of its proper divisors (791229327).

1355020401 is a wasteful number, since it uses less digits than its factorization.

1355020401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21141.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1355020401 is about 36810.6017473227. The cubic root of 1355020401 is about 1106.5777781685.

Adding to 1355020401 its reverse (1040205531), we get a palindrome (2395225932).

The spelling of 1355020401 in words is "one billion, three hundred fifty-five million, twenty thousand, four hundred one".