1225132042 has 4 divisors (see below), whose sum is σ = 1837698066. Its totient is φ = 612566020.

The previous prime is 1225132039. The next prime is 1225132061. The reversal of 1225132042 is 2402315221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2402315221 = 1367 ⋅1757363.

It can be written as a sum of positive squares in only one way, i.e., 1223670361 + 1461681 = 34981^2 + 1209^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306283009 + ... + 306283012.

Almost surely, 2^1225132042 is an apocalyptic number.

1225132042 is a deficient number, since it is larger than the sum of its proper divisors (612566024).

1225132042 is an equidigital number, since it uses as much as digits as its factorization.

1225132042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612566023.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1225132042 is about 35001.8862634573. The cubic root of 1225132042 is about 1070.0259236157.

Adding to 1225132042 its reverse (2402315221), we get a palindrome (3627447263).

The spelling of 1225132042 in words is "one billion, two hundred twenty-five million, one hundred thirty-two thousand, forty-two".