1541389121 has 4 divisors (see below), whose sum is σ = 1594540500. Its totient is φ = 1488237744.

The previous prime is 1541389093. The next prime is 1541389139. The reversal of 1541389121 is 1219831451.

It is a happy number.

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 859134721 + 682254400 = 29311^2 + 26120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1541389121 - 2²⁶ = 1474280257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1541389151) 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, 26575646 + ... + 26575703.

It is an arithmetic number, because the mean of its divisors is an integer number (398635125).

Almost surely, 2^1541389121 is an apocalyptic number.

It is an amenable number.

1541389121 is a deficient number, since it is larger than the sum of its proper divisors (53151379).

1541389121 is an equidigital number, since it uses as much as digits as its factorization.

1541389121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53151378.

The product of its digits is 8640, while the sum is 35.

The square root of 1541389121 is about 39260.5287916503. The cubic root of 1541389121 is about 1155.1474661634.

The spelling of 1541389121 in words is "one billion, five hundred forty-one million, three hundred eighty-nine thousand, one hundred twenty-one".