400001245 has 16 divisors (see below), whose sum is σ = 580843008. Its totient is φ = 258151680.

The previous prime is 400001233. The next prime is 400001249. The reversal of 400001245 is 542100004.

400001245 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 400001245 - 2²⁷ = 265783517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400001249) 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, 335541 + ... + 336730.

It is an arithmetic number, because the mean of its divisors is an integer number (36302688).

Almost surely, 2^400001245 is an apocalyptic number.

It is an amenable number.

400001245 is a deficient number, since it is larger than the sum of its proper divisors (180841763).

400001245 is a wasteful number, since it uses less digits than its factorization.

400001245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672300.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 400001245 is about 20000.0311249758. The cubic root of 400001245 is about 736.8070641638.

Adding to 400001245 its reverse (542100004), we get a palindrome (942101249).

The spelling of 400001245 in words is "four hundred million, one thousand, two hundred forty-five".