400126357 has 2 divisors, whose sum is σ = 400126358. Its totient is φ = 400126356.

The previous prime is 400126319. The next prime is 400126381. The reversal of 400126357 is 753621004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249671601 + 150454756 = 15801^2 + 12266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400126357 is a prime.

It is a super-2 number, since 2×400126357² = 320202203132182898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400126387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200063178 + 200063179.

It is an arithmetic number, because the mean of its divisors is an integer number (200063179).

Almost surely, 2^400126357 is an apocalyptic number.

It is an amenable number.

400126357 is a deficient number, since it is larger than the sum of its proper divisors (1).

400126357 is an equidigital number, since it uses as much as digits as its factorization.

400126357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 400126357 is about 20003.1586755692. The cubic root of 400126357 is about 736.8838754215.

The spelling of 400126357 in words is "four hundred million, one hundred twenty-six thousand, three hundred fifty-seven".