1231887446 has 4 divisors (see below), whose sum is σ = 1847831172. Its totient is φ = 615943722.

The previous prime is 1231887431. The next prime is 1231887463. The reversal of 1231887446 is 6447881321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6447881321 = 7 ⋅921125903.

It is a super-2 number, since 2×1231887446² = 3035093359224805832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231887397 and 1231887406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307971860 + ... + 307971863.

It is an arithmetic number, because the mean of its divisors is an integer number (461957793).

Almost surely, 2^1231887446 is an apocalyptic number.

1231887446 is a deficient number, since it is larger than the sum of its proper divisors (615943726).

1231887446 is an equidigital number, since it uses as much as digits as its factorization.

1231887446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615943725.

The product of its digits is 258048, while the sum is 44.

The square root of 1231887446 is about 35098.2541731067. The cubic root of 1231887446 is about 1071.9890350061.

The spelling of 1231887446 in words is "one billion, two hundred thirty-one million, eight hundred eighty-seven thousand, four hundred forty-six".