1201000401 has 12 divisors (see below), whose sum is σ = 1764182160. Its totient is φ = 787095960.

The previous prime is 1201000397. The next prime is 1201000439. The reversal of 1201000401 is 1040001021.

It is a happy number.

It is not a de Polignac number, because 1201000401 - 2² = 1201000397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1201000201) 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, 1130355 + ... + 1131416.

It is an arithmetic number, because the mean of its divisors is an integer number (147015180).

Almost surely, 2^1201000401 is an apocalyptic number.

It is an amenable number.

1201000401 is a deficient number, since it is larger than the sum of its proper divisors (563181759).

1201000401 is a wasteful number, since it uses less digits than its factorization.

1201000401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261836 (or 2261833 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1201000401 is about 34655.4526878527. The cubic root of 1201000401 is about 1062.9537884638.

Adding to 1201000401 its reverse (1040001021), we get a palindrome (2241001422).

The spelling of 1201000401 in words is "one billion, two hundred one million, four hundred one", and thus it is an aban number.