1226525421 has 16 divisors (see below), whose sum is σ = 1825528320. Its totient is φ = 726060720.

The previous prime is 1226525387. The next prime is 1226525423. The reversal of 1226525421 is 1245256221.

It is not a de Polignac number, because 1226525421 - 2⁶ = 1226525357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226525423) 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, 430761 + ... + 433598.

It is an arithmetic number, because the mean of its divisors is an integer number (114095520).

Almost surely, 2^1226525421 is an apocalyptic number.

1226525421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1226525421 is a deficient number, since it is larger than the sum of its proper divisors (599002899).

1226525421 is a wasteful number, since it uses less digits than its factorization.

1226525421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864416.

The product of its digits is 9600, while the sum is 30.

The square root of 1226525421 is about 35021.7849488001. The cubic root of 1226525421 is about 1070.4314273281.

The spelling of 1226525421 in words is "one billion, two hundred twenty-six million, five hundred twenty-five thousand, four hundred twenty-one".