1225146637 has 16 divisors (see below), whose sum is σ = 1442347200. Its totient is φ = 1025942400.

The previous prime is 1225146563. The next prime is 1225146661. The reversal of 1225146637 is 7366415221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225146637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225146596 and 1225146605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225146737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61489 + ... + 78937.

It is an arithmetic number, because the mean of its divisors is an integer number (90146700).

Almost surely, 2^1225146637 is an apocalyptic number.

It is an amenable number.

1225146637 is a deficient number, since it is larger than the sum of its proper divisors (217200563).

1225146637 is a wasteful number, since it uses less digits than its factorization.

1225146637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17964.

The product of its digits is 60480, while the sum is 37.

The square root of 1225146637 is about 35002.0947516002. The cubic root of 1225146637 is about 1070.0301726723.

The spelling of 1225146637 in words is "one billion, two hundred twenty-five million, one hundred forty-six thousand, six hundred thirty-seven".