1240088257 has 8 divisors (see below), whose sum is σ = 1347464960. Its totient is φ = 1136922480.

The previous prime is 1240088251. The next prime is 1240088261. The reversal of 1240088257 is 7528800421.

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 1240088257 - 2³ = 1240088249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240088251) 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, 1052118 + ... + 1053295.

It is an arithmetic number, because the mean of its divisors is an integer number (168433120).

Almost surely, 2^1240088257 is an apocalyptic number.

It is an amenable number.

1240088257 is a deficient number, since it is larger than the sum of its proper divisors (107376703).

1240088257 is a wasteful number, since it uses less digits than its factorization.

1240088257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105463.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 1240088257 is about 35214.8868662104. The cubic root of 1240088257 is about 1074.3625590313.

Adding to 1240088257 its reverse (7528800421), we get a palindrome (8768888678).

The spelling of 1240088257 in words is "one billion, two hundred forty million, eighty-eight thousand, two hundred fifty-seven".