1215001049 has 2 divisors, whose sum is σ = 1215001050. Its totient is φ = 1215001048.

The previous prime is 1215001003. The next prime is 1215001121. The reversal of 1215001049 is 9401005121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 775344025 + 439657024 = 27845^2 + 20968^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215001049 - 2⁸ = 1215000793 is a prime.

It is a super-2 number, since 2×1215001049² = 2952455098142200802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1215001349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607500524 + 607500525.

It is an arithmetic number, because the mean of its divisors is an integer number (607500525).

Almost surely, 2^1215001049 is an apocalyptic number.

It is an amenable number.

1215001049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215001049 is an equidigital number, since it uses as much as digits as its factorization.

1215001049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1215001049 is about 34856.8651631210. The cubic root of 1215001049 is about 1067.0682984400.

The spelling of 1215001049 in words is "one billion, two hundred fifteen million, one thousand, forty-nine".