1240545031 has 8 divisors (see below), whose sum is σ = 1358141328. Its totient is φ = 1123752000.

The previous prime is 1240545013. The next prime is 1240545037. The reversal of 1240545031 is 1305450421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1240545031 - 2¹³ = 1240536839 is a prime.

It is a super-2 number, since 2×1240545031² = 3077903947877581922, 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 = 1240544987 and 1240545005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240545037) 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, 197580 + ... + 203761.

It is an arithmetic number, because the mean of its divisors is an integer number (169767666).

Almost surely, 2^1240545031 is an apocalyptic number.

1240545031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1240545031 is a deficient number, since it is larger than the sum of its proper divisors (117596297).

1240545031 is a wasteful number, since it uses less digits than its factorization.

1240545031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401633.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1240545031 is about 35221.3717932735. The cubic root of 1240545031 is about 1074.4944530423.

Adding to 1240545031 its reverse (1305450421), we get a palindrome (2545995452).

The spelling of 1240545031 in words is "one billion, two hundred forty million, five hundred forty-five thousand, thirty-one".