1240214531 has 4 divisors (see below), whose sum is σ = 1305489000. Its totient is φ = 1174940064.

The previous prime is 1240214519. The next prime is 1240214537. The reversal of 1240214531 is 1354120421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1354120421 = 911 ⋅1486411.

It is a cyclic number.

It is not a de Polignac number, because 1240214531 - 2⁶ = 1240214467 is a prime.

It is a super-2 number, since 2×1240214531² = 3076264165807099922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240214497 and 1240214506.

It is not an unprimeable number, because it can be changed into a prime (1240214537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32637206 + ... + 32637243.

It is an arithmetic number, because the mean of its divisors is an integer number (326372250).

Almost surely, 2^1240214531 is an apocalyptic number.

1240214531 is a deficient number, since it is larger than the sum of its proper divisors (65274469).

1240214531 is an equidigital number, since it uses as much as digits as its factorization.

1240214531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65274468.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1240214531 is about 35216.6797270839. The cubic root of 1240214531 is about 1074.3990240309.

Adding to 1240214531 its reverse (1354120421), we get a palindrome (2594334952).

The spelling of 1240214531 in words is "one billion, two hundred forty million, two hundred fourteen thousand, five hundred thirty-one".