1040120421 has 16 divisors (see below), whose sum is σ = 1480782336. Its totient is φ = 647838576.

The previous prime is 1040120369. The next prime is 1040120423. The reversal of 1040120421 is 1240210401.

It is not a de Polignac number, because 1040120421 - 2²¹ = 1038023269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1040120421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040120423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172315 + ... + 178248.

It is an arithmetic number, because the mean of its divisors is an integer number (92548896).

Almost surely, 2^1040120421 is an apocalyptic number.

It is an amenable number.

1040120421 is a deficient number, since it is larger than the sum of its proper divisors (440661915).

1040120421 is a wasteful number, since it uses less digits than its factorization.

1040120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350632.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1040120421 is about 32250.8979874980. The cubic root of 1040120421 is about 1013.1985066919.

Adding to 1040120421 its reverse (1240210401), we get a palindrome (2280330822).

The spelling of 1040120421 in words is "one billion, forty million, one hundred twenty thousand, four hundred twenty-one".