1253023420 has 48 divisors (see below), whose sum is σ = 3039428448. Its totient is φ = 428840960.

The previous prime is 1253023349. The next prime is 1253023433. The reversal of 1253023420 is 243203521.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1253023391 and 1253023400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163777 + ... + 171256.

It is an arithmetic number, because the mean of its divisors is an integer number (63321426).

Almost surely, 2^1253023420 is an apocalyptic number.

1253023420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253023420 is an abundant number, since it is smaller than the sum of its proper divisors (1786405028).

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

1253023420 is a wasteful number, since it uses less digits than its factorization.

1253023420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335070 (or 335068 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1253023420 is about 35398.0708513896. The cubic root of 1253023420 is about 1078.0851471875.

Adding to 1253023420 its reverse (243203521), we get a palindrome (1496226941).

The spelling of 1253023420 in words is "one billion, two hundred fifty-three million, twenty-three thousand, four hundred twenty".