1154261542 has 20 divisors (see below), whose sum is σ = 2019845916. Its totient is φ = 494681460.

The previous prime is 1154261527. The next prime is 1154261543. The reversal of 1154261542 is 2451624511.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154261543) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 115384 + ... + 124987.

Almost surely, 2^1154261542 is an apocalyptic number.

1154261542 is a deficient number, since it is larger than the sum of its proper divisors (865584374).

1154261542 is an frugal number, since it uses more digits than its factorization.

1154261542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240401 (or 240380 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 1154261542 is about 33974.4248222100. The cubic root of 1154261542 is about 1048.9820950093.

The spelling of 1154261542 in words is "one billion, one hundred fifty-four million, two hundred sixty-one thousand, five hundred forty-two".