156421006 has 8 divisors (see below), whose sum is σ = 268150320. Its totient is φ = 67037568.

The previous prime is 156421003. The next prime is 156421021. The reversal of 156421006 is 600124651.

156421006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×156421006² = 48935062236104072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156421003) 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, 5586451 + ... + 5586478.

It is an arithmetic number, because the mean of its divisors is an integer number (33518790).

Almost surely, 2^156421006 is an apocalyptic number.

156421006 is a deficient number, since it is larger than the sum of its proper divisors (111729314).

156421006 is a wasteful number, since it uses less digits than its factorization.

156421006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172938.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 156421006 is about 12506.8383694681. The cubic root of 156421006 is about 538.8050922069.

Adding to 156421006 its reverse (600124651), we get a palindrome (756545657).

The spelling of 156421006 in words is "one hundred fifty-six million, four hundred twenty-one thousand, six".