1225440741 has 12 divisors (see below), whose sum is σ = 1867582752. Its totient is φ = 700160184.

The previous prime is 1225440731. The next prime is 1225440743. The reversal of 1225440741 is 1470445221.

It is not a de Polignac number, because 1225440741 - 2¹⁵ = 1225407973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1225440699 and 1225440708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225440743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156600 + ... + 164238.

It is an arithmetic number, because the mean of its divisors is an integer number (155631896).

Almost surely, 2^1225440741 is an apocalyptic number.

It is an amenable number.

1225440741 is a deficient number, since it is larger than the sum of its proper divisors (642142011).

1225440741 is an frugal number, since it uses more digits than its factorization.

1225440741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15288 (or 7649 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 1225440741 is about 35006.2957337677. The cubic root of 1225440741 is about 1070.1157882675.

Adding to 1225440741 its reverse (1470445221), we get a palindrome (2695885962).

The spelling of 1225440741 in words is "one billion, two hundred twenty-five million, four hundred forty thousand, seven hundred forty-one".