1000401123 has 16 divisors (see below), whose sum is σ = 1401094656. Its totient is φ = 633705600.

The previous prime is 1000401113. The next prime is 1000401131. The reversal of 1000401123 is 3211040001.

It is a happy number.

It is not a de Polignac number, because 1000401123 - 2¹⁴ = 1000384739 is a prime.

It is a super-2 number, since 2×1000401123² = 2001604813799322258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1000401099 and 1000401108.

It is not an unprimeable number, because it can be changed into a prime (1000401113) 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, 37590 + ... + 58427.

It is an arithmetic number, because the mean of its divisors is an integer number (87568416).

Almost surely, 2^1000401123 is an apocalyptic number.

1000401123 is a deficient number, since it is larger than the sum of its proper divisors (400693533).

1000401123 is a wasteful number, since it uses less digits than its factorization.

1000401123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96194.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1000401123 is about 31629.1182773090. The cubic root of 1000401123 is about 1000.1336897929.

Adding to 1000401123 its reverse (3211040001), we get a palindrome (4211441124).

The spelling of 1000401123 in words is "one billion, four hundred one thousand, one hundred twenty-three".