400148025 has 12 divisors (see below), whose sum is σ = 661578192. Its totient is φ = 213412240.

The previous prime is 400147963. The next prime is 400148033. The reversal of 400148025 is 520841004.

It is not a de Polignac number, because 400148025 - 2¹² = 400143929 is a prime.

It is a super-2 number, since 2×400148025² = 320236883822801250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400147986 and 400148004.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 2667579 + ... + 2667728.

It is an arithmetic number, because the mean of its divisors is an integer number (55131516).

Almost surely, 2^400148025 is an apocalyptic number.

It is an amenable number.

400148025 is a deficient number, since it is larger than the sum of its proper divisors (261430167).

400148025 is a wasteful number, since it uses less digits than its factorization.

400148025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5335320 (or 5335315 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 400148025 is about 20003.7002826977. The cubic root of 400148025 is about 736.8971766461.

Adding to 400148025 its reverse (520841004), we get a palindrome (920989029).

The spelling of 400148025 in words is "four hundred million, one hundred forty-eight thousand, twenty-five".