1202040291 has 4 divisors (see below), whose sum is σ = 1602720392. Its totient is φ = 801360192.

The previous prime is 1202040253. The next prime is 1202040317. The reversal of 1202040291 is 1920402021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1202040291 - 2¹⁵ = 1202007523 is a prime.

It is a super-2 number, since 2×1202040291² = 2889801722374729362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202040211) 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, 200340046 + ... + 200340051.

It is an arithmetic number, because the mean of its divisors is an integer number (400680098).

Almost surely, 2^1202040291 is an apocalyptic number.

1202040291 is a deficient number, since it is larger than the sum of its proper divisors (400680101).

1202040291 is an equidigital number, since it uses as much as digits as its factorization.

1202040291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400680100.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1202040291 is about 34670.4527083221. The cubic root of 1202040291 is about 1063.2604872633.

The spelling of 1202040291 in words is "one billion, two hundred two million, forty thousand, two hundred ninety-one".