1242022401 has 12 divisors (see below), whose sum is σ = 1842520212. Its totient is φ = 805635936.

The previous prime is 1242022399. The next prime is 1242022427. The reversal of 1242022401 is 1042202421.

1242022401 is a `hidden beast` number, since 1 + 2 + 420 + 2 + 240 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 559559025 + 682463376 = 23655^2 + 26124^2 .

It is not a de Polignac number, because 1242022401 - 2¹ = 1242022399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242021401) 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, 1864566 + ... + 1865231.

It is an arithmetic number, because the mean of its divisors is an integer number (153543351).

Almost surely, 2^1242022401 is an apocalyptic number.

It is an amenable number.

1242022401 is a deficient number, since it is larger than the sum of its proper divisors (600497811).

1242022401 is a wasteful number, since it uses less digits than its factorization.

1242022401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729840 (or 3729837 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1242022401 is about 35242.3381886049. The cubic root of 1242022401 is about 1074.9208237342.

Adding to 1242022401 its reverse (1042202421), we get a palindrome (2284224822).

The spelling of 1242022401 in words is "one billion, two hundred forty-two million, twenty-two thousand, four hundred one".