1221406414 has 8 divisors (see below), whose sum is σ = 1832280048. Its totient is φ = 610646400.

The previous prime is 1221406409. The next prime is 1221406451. The reversal of 1221406414 is 4146041221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7599 + ... + 50005.

It is an arithmetic number, because the mean of its divisors is an integer number (229035006).

Almost surely, 2^1221406414 is an apocalyptic number.

1221406414 is a deficient number, since it is larger than the sum of its proper divisors (610873634).

1221406414 is a wasteful number, since it uses less digits than its factorization.

1221406414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56810.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1221406414 is about 34948.6253520793. The cubic root of 1221406414 is about 1068.9401722440.

Adding to 1221406414 its reverse (4146041221), we get a palindrome (5367447635).

The spelling of 1221406414 in words is "one billion, two hundred twenty-one million, four hundred six thousand, four hundred fourteen".