1240154421 has 8 divisors (see below), whose sum is σ = 1803861024. Its totient is φ = 751608720.

The previous prime is 1240154401. The next prime is 1240154431. The reversal of 1240154421 is 1244510421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1240154421 - 2⁹ = 1240153909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240154391 and 1240154400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240154401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18790186 + ... + 18790251.

It is an arithmetic number, because the mean of its divisors is an integer number (225482628).

Almost surely, 2^1240154421 is an apocalyptic number.

1240154421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1240154421 is a deficient number, since it is larger than the sum of its proper divisors (563706603).

1240154421 is a wasteful number, since it uses less digits than its factorization.

1240154421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37580451.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1240154421 is about 35215.8262859187. The cubic root of 1240154421 is about 1074.3816659671.

Adding to 1240154421 its reverse (1244510421), we get a palindrome (2484664842).

The spelling of 1240154421 in words is "one billion, two hundred forty million, one hundred fifty-four thousand, four hundred twenty-one".