1235928421 has 12 divisors (see below), whose sum is σ = 1548306732. Its totient is φ = 977876928.

The previous prime is 1235928319. The next prime is 1235928433. The reversal of 1235928421 is 1248295321.

It can be written as a sum of positive squares in 2 ways, for example, as 756800100 + 479128321 = 27510^2 + 21889^2 .

It is not a de Polignac number, because 1235928421 - 2¹³ = 1235920229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235928461) 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, 969480 + ... + 970753.

It is an arithmetic number, because the mean of its divisors is an integer number (129025561).

Almost surely, 2^1235928421 is an apocalyptic number.

It is an amenable number.

1235928421 is a deficient number, since it is larger than the sum of its proper divisors (312378311).

1235928421 is a wasteful number, since it uses less digits than its factorization.

1235928421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940260 (or 1940253 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 1235928421 is about 35155.7736509951. The cubic root of 1235928421 is about 1073.1599084431.

The spelling of 1235928421 in words is "one billion, two hundred thirty-five million, nine hundred twenty-eight thousand, four hundred twenty-one".