1240154536 has 16 divisors (see below), whose sum is σ = 2333874240. Its totient is φ = 617788080.

The previous prime is 1240154533. The next prime is 1240154537. The reversal of 1240154536 is 6354510421.

It is a happy number.

It is a super-2 number, since 2×1240154536² = 3075966546322750592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240154498 and 1240154507.

It is not an unprimeable number, because it can be changed into a prime (1240154533) 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, 283846 + ... + 288181.

It is an arithmetic number, because the mean of its divisors is an integer number (145867140).

Almost surely, 2^1240154536 is an apocalyptic number.

It is an amenable number.

1240154536 is a deficient number, since it is larger than the sum of its proper divisors (1093719704).

1240154536 is a wasteful number, since it uses less digits than its factorization.

1240154536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572304 (or 572300 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1240154536 is about 35215.8279187072. The cubic root of 1240154536 is about 1074.3816991764.

Adding to 1240154536 its reverse (6354510421), we get a palindrome (7594664957).

The spelling of 1240154536 in words is "one billion, two hundred forty million, one hundred fifty-four thousand, five hundred thirty-six".