400145451 has 16 divisors (see below), whose sum is σ = 563673600. Its totient is φ = 252082208.

The previous prime is 400145437. The next prime is 400145483. The reversal of 400145451 is 154541004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 400145451 - 2⁶ = 400145387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400145411) 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, 44841 + ... + 53018.

It is an arithmetic number, because the mean of its divisors is an integer number (35229600).

Almost surely, 2^400145451 is an apocalyptic number.

400145451 is a deficient number, since it is larger than the sum of its proper divisors (163528149).

400145451 is a wasteful number, since it uses less digits than its factorization.

400145451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97938.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 400145451 is about 20003.6359444977. The cubic root of 400145451 is about 736.8955965829.

Adding to 400145451 its reverse (154541004), we get a palindrome (554686455).

The spelling of 400145451 in words is "four hundred million, one hundred forty-five thousand, four hundred fifty-one".