1354198421 has 4 divisors (see below), whose sum is σ = 1354291500. Its totient is φ = 1354105344.

The previous prime is 1354198411. The next prime is 1354198423. The reversal of 1354198421 is 1248914531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 485717521 + 868480900 = 22039^2 + 29470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1354198421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1354198423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19466 + ... + 55563.

It is an arithmetic number, because the mean of its divisors is an integer number (338572875).

Almost surely, 2^1354198421 is an apocalyptic number.

It is an amenable number.

1354198421 is a deficient number, since it is larger than the sum of its proper divisors (93079).

1354198421 is an equidigital number, since it uses as much as digits as its factorization.

1354198421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93078.

The product of its digits is 34560, while the sum is 38.

The square root of 1354198421 is about 36799.4350635985. The cubic root of 1354198421 is about 1106.3539761782.

The spelling of 1354198421 in words is "one billion, three hundred fifty-four million, one hundred ninety-eight thousand, four hundred twenty-one".