1189442426 has 4 divisors (see below), whose sum is σ = 1784163642. Its totient is φ = 594721212.

The previous prime is 1189442413. The next prime is 1189442437. The reversal of 1189442426 is 6242449811.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 767345401 + 422097025 = 27701^2 + 20545^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 297360605 + ... + 297360608.

Almost surely, 2^1189442426 is an apocalyptic number.

1189442426 is a deficient number, since it is larger than the sum of its proper divisors (594721216).

1189442426 is an equidigital number, since it uses as much as digits as its factorization.

1189442426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594721215.

The product of its digits is 110592, while the sum is 41.

The square root of 1189442426 is about 34488.2940430518. The cubic root of 1189442426 is about 1059.5329691727.

The spelling of 1189442426 in words is "one billion, one hundred eighty-nine million, four hundred forty-two thousand, four hundred twenty-six".