1245432220 has 24 divisors (see below), whose sum is σ = 2676232944. Its totient is φ = 486587136.

The previous prime is 1245432193. The next prime is 1245432241. The reversal of 1245432220 is 222345421.

It is a super-2 number, since 2×1245432220² = 3102202829228256800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723229 + ... + 724948.

It is an arithmetic number, because the mean of its divisors is an integer number (111509706).

Almost surely, 2^1245432220 is an apocalyptic number.

1245432220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245432220 is an abundant number, since it is smaller than the sum of its proper divisors (1430800724).

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

1245432220 is a wasteful number, since it uses less digits than its factorization.

1245432220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448229 (or 1448227 counting only the distinct ones).

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

The square root of 1245432220 is about 35290.6817729553. The cubic root of 1245432220 is about 1075.9036123311.

Adding to 1245432220 its reverse (222345421), we get a palindrome (1467777641).

The spelling of 1245432220 in words is "one billion, two hundred forty-five million, four hundred thirty-two thousand, two hundred twenty".