1242401543415 has 24 divisors (see below), whose sum is σ = 2194128012960. Its totient is φ = 650112001344.

The previous prime is 1242401543389. The next prime is 1242401543417. The reversal of 1242401543415 is 5143451042421.

1242401543415 is a `hidden beast` number, since 1 + 24 + 240 + 1 + 54 + 341 + 5 = 666.

It is not a de Polignac number, because 1242401543415 - 2¹⁹ = 1242401019127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242401543415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242401543417) 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, 260459155 + ... + 260463924.

It is an arithmetic number, because the mean of its divisors is an integer number (91422000540).

Almost surely, 2^{1242401543415} is an apocalyptic number.

1242401543415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242401543415 is a deficient number, since it is larger than the sum of its proper divisors (951726469545).

1242401543415 is a wasteful number, since it uses less digits than its factorization.

1242401543415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520923143 (or 520923140 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 1242401543415 its reverse (5143451042421), we get a palindrome (6385852585836).

The spelling of 1242401543415 in words is "one trillion, two hundred forty-two billion, four hundred one million, five hundred forty-three thousand, four hundred fifteen".