1040215402 has 4 divisors (see below), whose sum is σ = 1560323106. Its totient is φ = 520107700.

The previous prime is 1040215369. The next prime is 1040215403. The reversal of 1040215402 is 2045120401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2045120401 = 27773 ⋅73637.

It can be written as a sum of positive squares in only one way, i.e., 657973801 + 382241601 = 25651^2 + 19551^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1040215402.

It is not an unprimeable number, because it can be changed into a prime (1040215403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260053849 + ... + 260053852.

Almost surely, 2^1040215402 is an apocalyptic number.

1040215402 is a deficient number, since it is larger than the sum of its proper divisors (520107704).

1040215402 is an equidigital number, since it uses as much as digits as its factorization.

1040215402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520107703.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1040215402 is about 32252.3704865239. The cubic root of 1040215402 is about 1013.2293466076.

Adding to 1040215402 its reverse (2045120401), we get a palindrome (3085335803).

The spelling of 1040215402 in words is "one billion, forty million, two hundred fifteen thousand, four hundred two".