1421215629 has 4 divisors (see below), whose sum is σ = 1894954176. Its totient is φ = 947477084.

The previous prime is 1421215619. The next prime is 1421215643. The reversal of 1421215629 is 9265121241.

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: 9265121241 = 3 ⋅3088373747.

It is a cyclic number.

It is not a de Polignac number, because 1421215629 - 2⁵ = 1421215597 is a prime.

It is a super-2 number, since 2×1421215629² = 4039707728227731282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1421215629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421215619) 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, 236869269 + ... + 236869274.

It is an arithmetic number, because the mean of its divisors is an integer number (473738544).

Almost surely, 2^1421215629 is an apocalyptic number.

It is an amenable number.

1421215629 is a deficient number, since it is larger than the sum of its proper divisors (473738547).

1421215629 is an equidigital number, since it uses as much as digits as its factorization.

1421215629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473738546.

The product of its digits is 8640, while the sum is 33.

The square root of 1421215629 is about 37699.0136343114. The cubic root of 1421215629 is about 1124.3115139509.

The spelling of 1421215629 in words is "one billion, four hundred twenty-one million, two hundred fifteen thousand, six hundred twenty-nine".