1225440634 has 16 divisors (see below), whose sum is σ = 2032738560. Its totient is φ = 549387360.

The previous prime is 1225440581. The next prime is 1225440647. The reversal of 1225440634 is 4360445221.

It is a junction number, because it is equal to n+sod(n) for n = 1225440596 and 1225440605.

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, 379914 + ... + 383125.

It is an arithmetic number, because the mean of its divisors is an integer number (127046160).

Almost surely, 2^1225440634 is an apocalyptic number.

1225440634 is a deficient number, since it is larger than the sum of its proper divisors (807297926).

1225440634 is a wasteful number, since it uses less digits than its factorization.

1225440634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763125.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 1225440634 is about 35006.2942054711. The cubic root of 1225440634 is about 1070.1157571215.

Adding to 1225440634 its reverse (4360445221), we get a palindrome (5585885855).

The spelling of 1225440634 in words is "one billion, two hundred twenty-five million, four hundred forty thousand, six hundred thirty-four".