1240155341 has 4 divisors (see below), whose sum is σ = 1280160384. Its totient is φ = 1200150300.

The previous prime is 1240155313. The next prime is 1240155353. The reversal of 1240155341 is 1435510421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1435510421 = 4339 ⋅330839.

It is a cyclic number.

It is not a de Polignac number, because 1240155341 - 2¹⁸ = 1239893197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240155341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240155361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20002475 + ... + 20002536.

It is an arithmetic number, because the mean of its divisors is an integer number (320040096).

Almost surely, 2^1240155341 is an apocalyptic number.

It is an amenable number.

1240155341 is a deficient number, since it is larger than the sum of its proper divisors (40005043).

1240155341 is an equidigital number, since it uses as much as digits as its factorization.

1240155341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40005042.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1240155341 is about 35215.8393482251. The cubic root of 1240155341 is about 1074.3819316412.

Adding to 1240155341 its reverse (1435510421), we get a palindrome (2675665762).

The spelling of 1240155341 in words is "one billion, two hundred forty million, one hundred fifty-five thousand, three hundred forty-one".