400121151 has 8 divisors (see below), whose sum is σ = 533791104. Its totient is φ = 266599320.

The previous prime is 400121131. The next prime is 400121177. The reversal of 400121151 is 151121004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400121151 - 2¹¹ = 400119103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400121151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400121101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30565 + ... + 41646.

It is an arithmetic number, because the mean of its divisors is an integer number (66723888).

Almost surely, 2^400121151 is an apocalyptic number.

400121151 is a deficient number, since it is larger than the sum of its proper divisors (133669953).

400121151 is a wasteful number, since it uses less digits than its factorization.

400121151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74061.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 400121151 is about 20003.0285456978. The cubic root of 400121151 is about 736.8806795693.

Adding to 400121151 its reverse (151121004), we get a palindrome (551242155).

It can be divided in two parts, 4001 and 21151, that added together give a palindrome (25152).

The spelling of 400121151 in words is "four hundred million, one hundred twenty-one thousand, one hundred fifty-one".