1225520654 has 4 divisors (see below), whose sum is σ = 1838280984. Its totient is φ = 612760326.

The previous prime is 1225520591. The next prime is 1225520669. The reversal of 1225520654 is 4560255221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4560255221 = 43 ⋅106052447.

It is a self number, because there is not a number n which added to its sum of digits gives 1225520654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306380162 + ... + 306380165.

It is an arithmetic number, because the mean of its divisors is an integer number (459570246).

Almost surely, 2^1225520654 is an apocalyptic number.

1225520654 is a deficient number, since it is larger than the sum of its proper divisors (612760330).

1225520654 is an equidigital number, since it uses as much as digits as its factorization.

1225520654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612760329.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 1225520654 is about 35007.4371241312. The cubic root of 1225520654 is about 1070.1390490969.

Adding to 1225520654 its reverse (4560255221), we get a palindrome (5785775875).

The spelling of 1225520654 in words is "one billion, two hundred twenty-five million, five hundred twenty thousand, six hundred fifty-four".