1541232261 has 12 divisors (see below), whose sum is σ = 2239094988. Its totient is φ = 1021547904.

The previous prime is 1541232247. The next prime is 1541232263. The reversal of 1541232261 is 1622321451.

It can be written as a sum of positive squares in 2 ways, for example, as 1367150625 + 174081636 = 36975^2 + 13194^2 .

It is not a de Polignac number, because 1541232261 - 2⁶ = 1541232197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1541232263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 493380 + ... + 496493.

It is an arithmetic number, because the mean of its divisors is an integer number (186591249).

Almost surely, 2^1541232261 is an apocalyptic number.

It is an amenable number.

1541232261 is a deficient number, since it is larger than the sum of its proper divisors (697862727).

1541232261 is a wasteful number, since it uses less digits than its factorization.

1541232261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990052 (or 990049 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1541232261 is about 39258.5310601403. The cubic root of 1541232261 is about 1155.1082801729.

The spelling of 1541232261 in words is "one billion, five hundred forty-one million, two hundred thirty-two thousand, two hundred sixty-one".