123131445 has 8 divisors (see below), whose sum is σ = 197010336. Its totient is φ = 65670096.

The previous prime is 123131429. The next prime is 123131483. The reversal of 123131445 is 544131321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123131445 - 2⁴ = 123131429 is a prime.

It is a super-2 number, since 2×123131445² = 30322705495576050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4104367 + ... + 4104396.

It is an arithmetic number, because the mean of its divisors is an integer number (24626292).

Almost surely, 2^123131445 is an apocalyptic number.

123131445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123131445 is a deficient number, since it is larger than the sum of its proper divisors (73878891).

123131445 is an equidigital number, since it uses as much as digits as its factorization.

123131445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8208771.

The product of its digits is 1440, while the sum is 24.

The square root of 123131445 is about 11096.4609222941. The cubic root of 123131445 is about 497.4960749840.

Adding to 123131445 its reverse (544131321), we get a palindrome (667262766).

The spelling of 123131445 in words is "one hundred twenty-three million, one hundred thirty-one thousand, four hundred forty-five".