1215042150457 has 2 divisors, whose sum is σ = 1215042150458. Its totient is φ = 1215042150456.

The previous prime is 1215042150349. The next prime is 1215042150461. The reversal of 1215042150457 is 7540512405121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189547960896 + 25494189561 = 1090664^2 + 159669^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215042150457 - 2²⁷ = 1214907932729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215042151457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607521075228 + 607521075229.

It is an arithmetic number, because the mean of its divisors is an integer number (607521075229).

Almost surely, 2^{1215042150457} is an apocalyptic number.

It is an amenable number.

1215042150457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215042150457 is an equidigital number, since it uses as much as digits as its factorization.

1215042150457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56000, while the sum is 37.

Adding to 1215042150457 its reverse (7540512405121), we get a palindrome (8755554555578).

The spelling of 1215042150457 in words is "one trillion, two hundred fifteen billion, forty-two million, one hundred fifty thousand, four hundred fifty-seven".