1253601720 has 96 divisors (see below), whose sum is σ = 4656244320. Its totient is φ = 286536960.

The previous prime is 1253601707. The next prime is 1253601721. The reversal of 1253601720 is 271063521.

It is a happy number.

1253601720 is a `hidden beast` number, since 1 + 2 + 53 + 601 + 7 + 2 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253601721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246211 + ... + 251250.

It is an arithmetic number, because the mean of its divisors is an integer number (48502545).

Almost surely, 2^1253601720 is an apocalyptic number.

1253601720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253601720 is an abundant number, since it is smaller than the sum of its proper divisors (3402642600).

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

1253601720 is a wasteful number, since it uses less digits than its factorization.

1253601720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497485 (or 497478 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1253601720 is about 35406.2384333609. The cubic root of 1253601720 is about 1078.2509756261.

The spelling of 1253601720 in words is "one billion, two hundred fifty-three million, six hundred one thousand, seven hundred twenty".