1240402315 has 32 divisors (see below), whose sum is σ = 1552291776. Its totient is φ = 950845440.

The previous prime is 1240402313. The next prime is 1240402337. The reversal of 1240402315 is 5132040421.

It is not a de Polignac number, because 1240402315 - 2¹ = 1240402313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240402313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4233309 + ... + 4233601.

It is an arithmetic number, because the mean of its divisors is an integer number (48509118).

Almost surely, 2^1240402315 is an apocalyptic number.

1240402315 is a deficient number, since it is larger than the sum of its proper divisors (311889461).

1240402315 is a wasteful number, since it uses less digits than its factorization.

1240402315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1240402315 is about 35219.3457491760. The cubic root of 1240402315 is about 1074.4532471133.

Adding to 1240402315 its reverse (5132040421), we get a palindrome (6372442736).

The spelling of 1240402315 in words is "one billion, two hundred forty million, four hundred two thousand, three hundred fifteen".