400137 has 4 divisors (see below), whose sum is σ = 533520. Its totient is φ = 266756.

The previous prime is 400123. The next prime is 400151. The reversal of 400137 is 731004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (400123) and next prime (400151).

It is a cyclic number.

It is not a de Polignac number, because 400137 - 2⁷ = 400009 is a prime.

It is a D-number.

400137 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400137.

It is not an unprimeable number, because it can be changed into a prime (400157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66687 + ... + 66692.

It is an arithmetic number, because the mean of its divisors is an integer number (133380).

2⁴⁰⁰¹³⁷ is an apocalyptic number.

It is an amenable number.

400137 is a deficient number, since it is larger than the sum of its proper divisors (133383).

400137 is a wasteful number, since it uses less digits than its factorization.

400137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133382.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 400137 is about 632.5638307713. The cubic root of 400137 is about 73.6890408846.

The spelling of 400137 in words is "four hundred thousand, one hundred thirty-seven".