1421653121 has 12 divisors (see below), whose sum is σ = 1654611732. Its totient is φ = 1217932128.

The previous prime is 1421653091. The next prime is 1421653127. The reversal of 1421653121 is 1213561241.

It can be written as a sum of positive squares in 2 ways, for example, as 137147521 + 1284505600 = 11711^2 + 35840^2 .

It is not a de Polignac number, because 1421653121 - 2³⁰ = 347911297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421653127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106031 + ... + 118683.

It is an arithmetic number, because the mean of its divisors is an integer number (137884311).

Almost surely, 2^1421653121 is an apocalyptic number.

It is an amenable number.

1421653121 is a deficient number, since it is larger than the sum of its proper divisors (232958611).

1421653121 is a wasteful number, since it uses less digits than its factorization.

1421653121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14960 (or 14953 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 1421653121 is about 37704.8156208196. The cubic root of 1421653121 is about 1124.4268675069.

The spelling of 1421653121 in words is "one billion, four hundred twenty-one million, six hundred fifty-three thousand, one hundred twenty-one".