49001021 has 4 divisors (see below), whose sum is σ = 51883452. Its totient is φ = 46118592.

The previous prime is 49001011. The next prime is 49001033. The reversal of 49001021 is 12010094.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13060996 + 35940025 = 3614^2 + 5995^2 .

It is a cyclic number.

It is not a de Polignac number, because 49001021 - 2⁶ = 49000957 is a prime.

It is a super-2 number, since 2×49001021² = 4802200118084882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 2882413 = 49001021 / (4 + 9 + 0 + 0 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49001011) 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, 1441190 + ... + 1441223.

It is an arithmetic number, because the mean of its divisors is an integer number (12970863).

Almost surely, 2^49001021 is an apocalyptic number.

It is an amenable number.

49001021 is a deficient number, since it is larger than the sum of its proper divisors (2882431).

49001021 is a wasteful number, since it uses less digits than its factorization.

49001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882430.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 49001021 is about 7000.0729281915. The cubic root of 49001021 is about 365.9331125841.

The spelling of 49001021 in words is "forty-nine million, one thousand, twenty-one".