156421541 has 4 divisors (see below), whose sum is σ = 157471500. Its totient is φ = 155371584.

The previous prime is 156421511. The next prime is 156421543. The reversal of 156421541 is 145124651.

156421541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90649441 + 65772100 = 9521^2 + 8110^2 .

It is a cyclic number.

It is not a de Polignac number, because 156421541 - 2¹⁴ = 156405157 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 (156421543) 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, 524756 + ... + 525053.

It is an arithmetic number, because the mean of its divisors is an integer number (39367875).

Almost surely, 2^156421541 is an apocalyptic number.

It is an amenable number.

156421541 is a deficient number, since it is larger than the sum of its proper divisors (1049959).

156421541 is a wasteful number, since it uses less digits than its factorization.

156421541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049958.

The product of its digits is 4800, while the sum is 29.

The square root of 156421541 is about 12506.8597577489. The cubic root of 156421541 is about 538.8057064901.

The spelling of 156421541 in words is "one hundred fifty-six million, four hundred twenty-one thousand, five hundred forty-one".