1421622645 has 16 divisors (see below), whose sum is σ = 2347971072. Its totient is φ = 733740480.

The previous prime is 1421622623. The next prime is 1421622647. The reversal of 1421622645 is 5462261241.

It is not a de Polignac number, because 1421622645 - 2¹⁵ = 1421589877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421622647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1528162 + ... + 1529091.

It is an arithmetic number, because the mean of its divisors is an integer number (146748192).

Almost surely, 2^1421622645 is an apocalyptic number.

1421622645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421622645 is a deficient number, since it is larger than the sum of its proper divisors (926348427).

1421622645 is a wasteful number, since it uses less digits than its factorization.

1421622645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057292.

The product of its digits is 23040, while the sum is 33.

The square root of 1421622645 is about 37704.4114792951. The cubic root of 1421622645 is about 1124.4188326641.

Adding to 1421622645 its reverse (5462261241), we get a palindrome (6883883886).

The spelling of 1421622645 in words is "one billion, four hundred twenty-one million, six hundred twenty-two thousand, six hundred forty-five".