1225135252 has 48 divisors (see below), whose sum is σ = 2438521344. Its totient is φ = 533520000.

The previous prime is 1225135217. The next prime is 1225135253. The reversal of 1225135252 is 2525315221.

It is a self number, because there is not a number n which added to its sum of digits gives 1225135252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225135253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133318 + ... + 142210.

It is an arithmetic number, because the mean of its divisors is an integer number (50802528).

Almost surely, 2^1225135252 is an apocalyptic number.

It is an amenable number.

1225135252 is a deficient number, since it is larger than the sum of its proper divisors (1213386092).

1225135252 is a wasteful number, since it uses less digits than its factorization.

1225135252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9040 (or 9038 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 1225135252 is about 35001.9321180989. The cubic root of 1225135252 is about 1070.0268581490.

It can be divided in two parts, 122513 and 5252, that added together give a triangular number (127765 = T₅₀₅).

The spelling of 1225135252 in words is "one billion, two hundred twenty-five million, one hundred thirty-five thousand, two hundred fifty-two".