1225015156 has 6 divisors (see below), whose sum is σ = 2143776530. Its totient is φ = 612507576.

The previous prime is 1225015151. The next prime is 1225015219. The reversal of 1225015156 is 6515105221.

It can be written as a sum of positive squares in only one way, i.e., 1176490000 + 48525156 = 34300^2 + 6966^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225015151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153126891 + ... + 153126898.

Almost surely, 2^1225015156 is an apocalyptic number.

It is an amenable number.

1225015156 is a deficient number, since it is larger than the sum of its proper divisors (918761374).

1225015156 is a wasteful number, since it uses less digits than its factorization.

1225015156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306253793 (or 306253791 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 1225015156 is about 35000.2165136160. The cubic root of 1225015156 is about 1069.9918932626.

The spelling of 1225015156 in words is "one billion, two hundred twenty-five million, fifteen thousand, one hundred fifty-six".