1243381354 has 4 divisors (see below), whose sum is σ = 1865072034. Its totient is φ = 621690676.

The previous prime is 1243381331. The next prime is 1243381397. The reversal of 1243381354 is 4531833421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4531833421 = 4261 ⋅1063561.

It can be written as a sum of positive squares in only one way, i.e., 948332025 + 295049329 = 30795^2 + 17177^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310845337 + ... + 310845340.

Almost surely, 2^1243381354 is an apocalyptic number.

1243381354 is a deficient number, since it is larger than the sum of its proper divisors (621690680).

1243381354 is an equidigital number, since it uses as much as digits as its factorization.

1243381354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621690679.

The product of its digits is 34560, while the sum is 34.

The square root of 1243381354 is about 35261.6130374094. The cubic root of 1243381354 is about 1075.3127207018.

The spelling of 1243381354 in words is "one billion, two hundred forty-three million, three hundred eighty-one thousand, three hundred fifty-four".