412215661 has 24 divisors (see below), whose sum is σ = 490257152. Its totient is φ = 344282400.

The previous prime is 412215607. The next prime is 412215667. The reversal of 412215661 is 166512214.

It is a de Polignac number, because none of the positive numbers 2^k-412215661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412215667) 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, 425800 + ... + 426766.

Almost surely, 2^412215661 is an apocalyptic number.

It is an amenable number.

412215661 is a deficient number, since it is larger than the sum of its proper divisors (78041491).

412215661 is a wasteful number, since it uses less digits than its factorization.

412215661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1262 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 412215661 is about 20303.0948626065. The cubic root of 412215661 is about 744.2316965632.

Adding to 412215661 its reverse (166512214), we get a palindrome (578727875).

The spelling of 412215661 in words is "four hundred twelve million, two hundred fifteen thousand, six hundred sixty-one".