1245841632 has 144 divisors (see below), whose sum is σ = 4063393152. Its totient is φ = 354689280.

The previous prime is 1245841607. The next prime is 1245841633. The reversal of 1245841632 is 2361485421.

It is a happy number.

1245841632 is a `hidden beast` number, since 12 + 4 + 5 + 8 + 4 + 1 + 632 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245841633) 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, 666363 + ... + 668229.

It is an arithmetic number, because the mean of its divisors is an integer number (28218008).

Almost surely, 2^1245841632 is an apocalyptic number.

1245841632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245841632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2031696576).

1245841632 is an abundant number, since it is smaller than the sum of its proper divisors (2817551520).

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

1245841632 is a wasteful number, since it uses less digits than its factorization.

1245841632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221 (or 2210 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 1245841632 is about 35296.4818643445. The cubic root of 1245841632 is about 1076.0214936536.

The spelling of 1245841632 in words is "one billion, two hundred forty-five million, eight hundred forty-one thousand, six hundred thirty-two".