1214621501 has 4 divisors (see below), whose sum is σ = 1222665504. Its totient is φ = 1206577500.

The previous prime is 1214621477. The next prime is 1214621539. The reversal of 1214621501 is 1051264121.

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.

It is a cyclic number.

It is not a de Polignac number, because 1214621501 - 2²⁶ = 1147512637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214621591) 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, 4021775 + ... + 4022076.

It is an arithmetic number, because the mean of its divisors is an integer number (305666376).

Almost surely, 2^1214621501 is an apocalyptic number.

It is an amenable number.

1214621501 is a deficient number, since it is larger than the sum of its proper divisors (8044003).

1214621501 is an equidigital number, since it uses as much as digits as its factorization.

1214621501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8044002.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1214621501 is about 34851.4203584302. The cubic root of 1214621501 is about 1066.9571748547.

Adding to 1214621501 its reverse (1051264121), we get a palindrome (2265885622).

The spelling of 1214621501 in words is "one billion, two hundred fourteen million, six hundred twenty-one thousand, five hundred one".