402126019 has 2 divisors, whose sum is σ = 402126020. Its totient is φ = 402126018.

The previous prime is 402126001. The next prime is 402126029. The reversal of 402126019 is 910621204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402126019 - 2⁵ = 402125987 is a prime.

It is a super-3 number, since 3×402126019³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 402125984 and 402126002.

It is not a weakly prime, because it can be changed into another prime (402126029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201063009 + 201063010.

It is an arithmetic number, because the mean of its divisors is an integer number (201063010).

Almost surely, 2^402126019 is an apocalyptic number.

402126019 is a deficient number, since it is larger than the sum of its proper divisors (1).

402126019 is an equidigital number, since it uses as much as digits as its factorization.

402126019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 402126019 is about 20053.0800377398. The cubic root of 402126019 is about 738.1093806291.

The spelling of 402126019 in words is "four hundred two million, one hundred twenty-six thousand, nineteen".