1215455241 has 96 divisors (see below), whose sum is σ = 2250436608. Its totient is φ = 573471360.

The previous prime is 1215455173. The next prime is 1215455257. The reversal of 1215455241 is 1425545121.

It is not a de Polignac number, because 1215455241 - 2¹⁵ = 1215422473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215455199 and 1215455208.

It is not an unprimeable number, because it can be changed into a prime (1215455041) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1407976 + ... + 1408838.

It is an arithmetic number, because the mean of its divisors is an integer number (23442048).

Almost surely, 2^1215455241 is an apocalyptic number.

1215455241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1215455241 is a deficient number, since it is larger than the sum of its proper divisors (1034981367).

1215455241 is a wasteful number, since it uses less digits than its factorization.

1215455241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 964 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The square root of 1215455241 is about 34863.3796554494. The cubic root of 1215455241 is about 1067.2012457892.

The spelling of 1215455241 in words is "one billion, two hundred fifteen million, four hundred fifty-five thousand, two hundred forty-one".