1225404534 has 16 divisors (see below), whose sum is σ = 2557366272. Its totient is φ = 390708648.

The previous prime is 1225404533. The next prime is 1225404547. The reversal of 1225404534 is 4354045221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225404533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4439734 + ... + 4440009.

It is an arithmetic number, because the mean of its divisors is an integer number (159835392).

Almost surely, 2^1225404534 is an apocalyptic number.

1225404534 is an abundant number, since it is smaller than the sum of its proper divisors (1331961738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225404534 is a wasteful number, since it uses less digits than its factorization.

1225404534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8879771.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 1225404534 is about 35005.7785801145. The cubic root of 1225404534 is about 1070.1052489127.

Adding to 1225404534 its reverse (4354045221), we get a palindrome (5579449755).

The spelling of 1225404534 in words is "one billion, two hundred twenty-five million, four hundred four thousand, five hundred thirty-four".