1215154001 has 8 divisors (see below), whose sum is σ = 1221109344. Its totient is φ = 1209208000.

The previous prime is 1215153991. The next prime is 1215154013. The reversal of 1215154001 is 1004515121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1215154001 - 2¹⁴ = 1215137617 is a prime.

It is a super-2 number, since 2×1215154001² = 2953198492292616002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215154021) 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, 501545 + ... + 503961.

It is an arithmetic number, because the mean of its divisors is an integer number (152638668).

Almost surely, 2^1215154001 is an apocalyptic number.

It is an amenable number.

1215154001 is a deficient number, since it is larger than the sum of its proper divisors (5955343).

1215154001 is a wasteful number, since it uses less digits than its factorization.

1215154001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1215154001 is about 34859.0590951620. The cubic root of 1215154001 is about 1067.1130729918.

Adding to 1215154001 its reverse (1004515121), we get a palindrome (2219669122).

The spelling of 1215154001 in words is "one billion, two hundred fifteen million, one hundred fifty-four thousand, one".