1245223420 has 48 divisors (see below), whose sum is σ = 2992808448. Its totient is φ = 426323520.

The previous prime is 1245223409. The next prime is 1245223457. The reversal of 1245223420 is 243225421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98035 + ... + 110005.

It is an arithmetic number, because the mean of its divisors is an integer number (62350176).

Almost surely, 2^1245223420 is an apocalyptic number.

1245223420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245223420 is an abundant number, since it is smaller than the sum of its proper divisors (1747585028).

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

1245223420 is a wasteful number, since it uses less digits than its factorization.

1245223420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12730 (or 12728 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1245223420 is about 35287.7233609651. The cubic root of 1245223420 is about 1075.8434829436.

Adding to 1245223420 its reverse (243225421), we get a palindrome (1488448841).

The spelling of 1245223420 in words is "one billion, two hundred forty-five million, two hundred twenty-three thousand, four hundred twenty".