1598421401 has 4 divisors (see below), whose sum is σ = 1598540304. Its totient is φ = 1598302500.

The previous prime is 1598421373. The next prime is 1598421431. The reversal of 1598421401 is 1041248951.

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: 1041248951 = 47 ⋅22154233.

It is a cyclic number.

It is not a de Polignac number, because 1598421401 - 2⁶ = 1598421337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1598421431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36275 + ... + 67176.

It is an arithmetic number, because the mean of its divisors is an integer number (399635076).

Almost surely, 2^1598421401 is an apocalyptic number.

It is an amenable number.

1598421401 is a deficient number, since it is larger than the sum of its proper divisors (118903).

1598421401 is a wasteful number, since it uses less digits than its factorization.

1598421401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118902.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1598421401 is about 39980.2626429592. The cubic root of 1598421401 is about 1169.2223144229. Note that the first 3 decimals are identical.

The spelling of 1598421401 in words is "one billion, five hundred ninety-eight million, four hundred twenty-one thousand, four hundred one".