1061694021 has 8 divisors (see below), whose sum is σ = 1453851424. Its totient is φ = 688666320.

The previous prime is 1061693953. The next prime is 1061694097. The reversal of 1061694021 is 1204961601.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1061694021 - 2¹⁴ = 1061677637 is a prime.

It is a super-2 number, since 2×1061694021² = 2254388388454296882, which contains 22 as substring.

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 1061694021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061694121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4782295 + ... + 4782516.

It is an arithmetic number, because the mean of its divisors is an integer number (181731428).

Almost surely, 2^1061694021 is an apocalyptic number.

It is an amenable number.

1061694021 is a deficient number, since it is larger than the sum of its proper divisors (392157403).

1061694021 is an equidigital number, since it uses as much as digits as its factorization.

1061694021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9564851.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1061694021 is about 32583.6465270540. The cubic root of 1061694021 is about 1020.1556923047.

The spelling of 1061694021 in words is "one billion, sixty-one million, six hundred ninety-four thousand, twenty-one".