1215453040 has 40 divisors (see below), whose sum is σ = 2846581200. Its totient is φ = 482628096.

The previous prime is 1215453037. The next prime is 1215453049. The reversal of 1215453040 is 403545121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1215452996 and 1215453014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215453049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44490 + ... + 66409.

It is an arithmetic number, because the mean of its divisors is an integer number (71164530).

Almost surely, 2^1215453040 is an apocalyptic number.

1215453040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215453040 is an abundant number, since it is smaller than the sum of its proper divisors (1631128160).

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

1215453040 is a wasteful number, since it uses less digits than its factorization.

1215453040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111049 (or 111043 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1215453040 is about 34863.3480893617. The cubic root of 1215453040 is about 1067.2006016104.

Adding to 1215453040 its reverse (403545121), we get a palindrome (1618998161).

The spelling of 1215453040 in words is "one billion, two hundred fifteen million, four hundred fifty-three thousand, forty".