1245421101 has 16 divisors (see below), whose sum is σ = 1764938240. Its totient is φ = 778941360.

The previous prime is 1245421081. The next prime is 1245421109. The reversal of 1245421101 is 1011245421.

It is not a de Polignac number, because 1245421101 - 2⁵ = 1245421069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245421109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100195 + ... + 111936.

It is an arithmetic number, because the mean of its divisors is an integer number (110308640).

Almost surely, 2^1245421101 is an apocalyptic number.

It is an amenable number.

1245421101 is a deficient number, since it is larger than the sum of its proper divisors (519517139).

1245421101 is a wasteful number, since it uses less digits than its factorization.

1245421101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212256.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1245421101 is about 35290.5242381011. The cubic root of 1245421101 is about 1075.9004104955.

Adding to 1245421101 its reverse (1011245421), we get a palindrome (2256666522).

It can be divided in two parts, 1245421 and 101, that multiplied together give a palindrome (125787521).

The spelling of 1245421101 in words is "one billion, two hundred forty-five million, four hundred twenty-one thousand, one hundred one".