1225404025 has 12 divisors (see below), whose sum is σ = 1527220332. Its totient is φ = 975343040.

The previous prime is 1225404017. The next prime is 1225404029. The reversal of 1225404025 is 5204045221.

It can be written as a sum of positive squares in 6 ways, for example, as 7463824 + 1217940201 = 2732^2 + 34899^2 .

It is not a de Polignac number, because 1225404025 - 2³ = 1225404017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225404029) 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, 119482 + ... + 129331.

It is an arithmetic number, because the mean of its divisors is an integer number (127268361).

Almost surely, 2^1225404025 is an apocalyptic number.

It is an amenable number.

1225404025 is a deficient number, since it is larger than the sum of its proper divisors (301816307).

1225404025 is a wasteful number, since it uses less digits than its factorization.

1225404025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249020 (or 249015 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1225404025 is about 35005.7713098855. The cubic root of 1225404025 is about 1070.1051007484.

Adding to 1225404025 its reverse (5204045221), we get a palindrome (6429449246).

The spelling of 1225404025 in words is "one billion, two hundred twenty-five million, four hundred four thousand, twenty-five".