1214907621 has 4 divisors (see below), whose sum is σ = 1619876832. Its totient is φ = 809938412.

The previous prime is 1214907611. The next prime is 1214907649. The reversal of 1214907621 is 1267094121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1267094121 = 3 ⋅422364707.

It is a cyclic number.

It is not a de Polignac number, because 1214907621 - 2¹⁰ = 1214906597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214907611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202484601 + ... + 202484606.

It is an arithmetic number, because the mean of its divisors is an integer number (404969208).

Almost surely, 2^1214907621 is an apocalyptic number.

It is an amenable number.

1214907621 is a deficient number, since it is larger than the sum of its proper divisors (404969211).

1214907621 is an equidigital number, since it uses as much as digits as its factorization.

1214907621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404969210.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1214907621 is about 34855.5249709426. The cubic root of 1214907621 is about 1067.0409468553.

The spelling of 1214907621 in words is "one billion, two hundred fourteen million, nine hundred seven thousand, six hundred twenty-one".