1245204252 has 30 divisors (see below), whose sum is σ = 3255210728. Its totient is φ = 415067976.

The previous prime is 1245204239. The next prime is 1245204269. The reversal of 1245204252 is 2524025421.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1921288 + ... + 1921935.

Almost surely, 2^1245204252 is an apocalyptic number.

1245204252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1245204252 is an abundant number, since it is smaller than the sum of its proper divisors (2010006476).

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

1245204252 is a wasteful number, since it uses less digits than its factorization.

1245204252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843239 (or 3843228 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 1245204252 is about 35287.4517640478. The cubic root of 1245204252 is about 1075.8379626829.

Adding to 1245204252 its reverse (2524025421), we get a palindrome (3769229673).

It can be divided in two parts, 1245204 and 252, that added together give a square (1245456 = 1116²).

The spelling of 1245204252 in words is "one billion, two hundred forty-five million, two hundred four thousand, two hundred fifty-two".