1213025040 has 120 divisors (see below), whose sum is σ = 4205230848. Its totient is φ = 313032960.

The previous prime is 1213025029. The next prime is 1213025063. The reversal of 1213025040 is 405203121.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4854 + ... + 49493.

Almost surely, 2^1213025040 is an apocalyptic number.

1213025040 is a gapful number since it is divisible by the number (10) 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 1213025040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102615424).

1213025040 is an abundant number, since it is smaller than the sum of its proper divisors (2992205808).

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

1213025040 is a wasteful number, since it uses less digits than its factorization.

1213025040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54397 (or 54388 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1213025040 is about 34828.5090120149. The cubic root of 1213025040 is about 1066.4895113777.

Adding to 1213025040 its reverse (405203121), we get a palindrome (1618228161).

The spelling of 1213025040 in words is "one billion, two hundred thirteen million, twenty-five thousand, forty".