1225142112 has 48 divisors (see below), whose sum is σ = 3256727040. Its totient is φ = 403208832.

The previous prime is 1225142099. The next prime is 1225142119. The reversal of 1225142112 is 2112415221.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225142119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73188 + ... + 88355.

It is an arithmetic number, because the mean of its divisors is an integer number (67848480).

Almost surely, 2^1225142112 is an apocalyptic number.

1225142112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225142112 is an abundant number, since it is smaller than the sum of its proper divisors (2031584928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225142112 is a wasteful number, since it uses less digits than its factorization.

1225142112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161635 (or 161627 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 1225142112 is about 35002.0301125520. The cubic root of 1225142112 is about 1070.0288553082.

Adding to 1225142112 its reverse (2112415221), we get a palindrome (3337557333).

The spelling of 1225142112 in words is "one billion, two hundred twenty-five million, one hundred forty-two thousand, one hundred twelve".