100401045 has 16 divisors (see below), whose sum is σ = 166181760. Its totient is φ = 51700544.

The previous prime is 100401043. The next prime is 100401047. The reversal of 100401045 is 540104001.

It is an interprime number because it is at equal distance from previous prime (100401043) and next prime (100401047).

It is a cyclic number.

It is not a de Polignac number, because 100401045 - 2¹ = 100401043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100401043) 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, 114969 + ... + 115838.

It is an arithmetic number, because the mean of its divisors is an integer number (10386360).

Almost surely, 2^100401045 is an apocalyptic number.

100401045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100401045 is a deficient number, since it is larger than the sum of its proper divisors (65780715).

100401045 is a wasteful number, since it uses less digits than its factorization.

100401045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230844.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 100401045 is about 10020.0321855771. The cubic root of 100401045 is about 464.7785510472.

Adding to 100401045 its reverse (540104001), we get a palindrome (640505046).

The spelling of 100401045 in words is "one hundred million, four hundred one thousand, forty-five".