1226521542 has 16 divisors (see below), whose sum is σ = 2597339952. Its totient is φ = 384791040.

The previous prime is 1226521537. The next prime is 1226521561. The reversal of 1226521542 is 2451256221.

1226521542 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6012259 + ... + 6012462.

It is an arithmetic number, because the mean of its divisors is an integer number (162333747).

Almost surely, 2^1226521542 is an apocalyptic number.

1226521542 is an abundant number, since it is smaller than the sum of its proper divisors (1370818410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1226521542 is a wasteful number, since it uses less digits than its factorization.

1226521542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12024743.

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

The square root of 1226521542 is about 35021.7295689405. The cubic root of 1226521542 is about 1070.4302988808.

Adding to 1226521542 its reverse (2451256221), we get a palindrome (3677777763).

The spelling of 1226521542 in words is "one billion, two hundred twenty-six million, five hundred twenty-one thousand, five hundred forty-two".